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3.3 SOLVING MULTI-STEP 
EQUATIONS 
OBJECTIVE: 
TO USE TWO OR MORE TRANSFORMATIONS TO SOLVE AN 
EQUATION. 
MR. ANIBAL AGUILAR BARAHONA
3.3 SOLVING MULTI-STEP EQUATIONS 
As we explained in past sections, solving a linear equation may require 
two or more transformations. Use these guidelines in the process of 
solving an equation: 
• Simplify one or both sides of the equation (if needed). 
• Use the inverse operations to isolate the variable. 
The process of solving a linear equation may be presented in 4 general 
cases: 
CASE 1: Combining Like Terms. 
CASE 2: Using the Distributive Property. 
CASE 3: Distributing a Negative Sign. 
CASE 4: Multiplying by a Reciprocal
3.3 SOLVING MULTI-STEP EQUATIONS 
CASE 1: COMBINING LIKE TERMS. 
Solve the equation 2푥 − 9푥 + 17 = −4 
Solution: 
2푥 − 9푥 + 17 = −4 Copy the original equation 
−7푥 + 17 = −4 Combine the like terms. 
−7푥 + 17 − 17 = −4 − 17 Apply the inverse operation. 
−7푥 = −21 Combine like terms. 
푥 = 3 Divide by -3 both sides.
3.3 SOLVING MULTI-STEP EQUATIONS 
CASE 2: USING THE DISTRIBUTIVE PROPERTY. 
Solve the equation: 4푥 + 12 푥 − 3 = 28 
Solution: 
4푥 + 12 푥 − 3 = 28 Copy the original equation. 
4푥 + 12푥 − 36 = 28 Apply the Distributive Property. 
16푥 − 36 = 28 Combine like terms. 
16푥 − 36 + 36 = 28 + 36 Apply the inverse operation. 
16푥 = 64 Combine like terms. 
푥 = 4 Divide by 16 both sides.
3.3 SOLVING MULTI-STEP EQUATIONS 
CASE 3: DISTRIBUTING A NEGATIVE NUMBER. 
Solve the following equation: 10푥 − 6 2푥 + 5 = 20 
Solution: 
10푥 − 6 2푥 + 5 = 20 Copy the original equation. 
10푥 − 12푥 − 30 = 20 Distribute -6 in the expression. 
−2푥 − 30 = 20 Combine like terms. 
−2푥 − 30 + 30 = 20 + 30 Apply the inverse operation. 
−2푥 = 50 Combine like terms. 
푥 = −25 Divide by – 2 both sides.
3.3 SOLVING MULTI-STEP EQUATIONS 
CASE 4: MULTIPLYING BY A RECIPROCAL. 
Solve the equation: 
4 
3 
푥 − 7 = −24 
Solution: 
4 
3 
푥 − 7 = −24 Copy the original equation. 
3 
4 
4 
3 
푥 − 7 = −24 
3 
4 
Multiply both sides by the 
reciprocal. . 
푥 − 7 = −18 Simplify fractions on both sides. 
푥 − 7 + 7 = −18 + 7 Apply the inverse operations. 
푥 = −11 Simplify like terms.
HOMEWORK: 
PGS. 148 – 149 
EXERCISES 16 to 40

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3.3 Solving Multi-Step Equations

  • 1. 3.3 SOLVING MULTI-STEP EQUATIONS OBJECTIVE: TO USE TWO OR MORE TRANSFORMATIONS TO SOLVE AN EQUATION. MR. ANIBAL AGUILAR BARAHONA
  • 2. 3.3 SOLVING MULTI-STEP EQUATIONS As we explained in past sections, solving a linear equation may require two or more transformations. Use these guidelines in the process of solving an equation: • Simplify one or both sides of the equation (if needed). • Use the inverse operations to isolate the variable. The process of solving a linear equation may be presented in 4 general cases: CASE 1: Combining Like Terms. CASE 2: Using the Distributive Property. CASE 3: Distributing a Negative Sign. CASE 4: Multiplying by a Reciprocal
  • 3. 3.3 SOLVING MULTI-STEP EQUATIONS CASE 1: COMBINING LIKE TERMS. Solve the equation 2푥 − 9푥 + 17 = −4 Solution: 2푥 − 9푥 + 17 = −4 Copy the original equation −7푥 + 17 = −4 Combine the like terms. −7푥 + 17 − 17 = −4 − 17 Apply the inverse operation. −7푥 = −21 Combine like terms. 푥 = 3 Divide by -3 both sides.
  • 4. 3.3 SOLVING MULTI-STEP EQUATIONS CASE 2: USING THE DISTRIBUTIVE PROPERTY. Solve the equation: 4푥 + 12 푥 − 3 = 28 Solution: 4푥 + 12 푥 − 3 = 28 Copy the original equation. 4푥 + 12푥 − 36 = 28 Apply the Distributive Property. 16푥 − 36 = 28 Combine like terms. 16푥 − 36 + 36 = 28 + 36 Apply the inverse operation. 16푥 = 64 Combine like terms. 푥 = 4 Divide by 16 both sides.
  • 5. 3.3 SOLVING MULTI-STEP EQUATIONS CASE 3: DISTRIBUTING A NEGATIVE NUMBER. Solve the following equation: 10푥 − 6 2푥 + 5 = 20 Solution: 10푥 − 6 2푥 + 5 = 20 Copy the original equation. 10푥 − 12푥 − 30 = 20 Distribute -6 in the expression. −2푥 − 30 = 20 Combine like terms. −2푥 − 30 + 30 = 20 + 30 Apply the inverse operation. −2푥 = 50 Combine like terms. 푥 = −25 Divide by – 2 both sides.
  • 6. 3.3 SOLVING MULTI-STEP EQUATIONS CASE 4: MULTIPLYING BY A RECIPROCAL. Solve the equation: 4 3 푥 − 7 = −24 Solution: 4 3 푥 − 7 = −24 Copy the original equation. 3 4 4 3 푥 − 7 = −24 3 4 Multiply both sides by the reciprocal. . 푥 − 7 = −18 Simplify fractions on both sides. 푥 − 7 + 7 = −18 + 7 Apply the inverse operations. 푥 = −11 Simplify like terms.
  • 7. HOMEWORK: PGS. 148 – 149 EXERCISES 16 to 40