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Solving 2 step variable equations

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• 1. Solving 2-Step Variable Equations Solving Two-Step Equation
• Ms. Nixon’s Math Class
• 2. Remember….
• 3. What??? I just learned 1-step!
• Relax. You’ll use what you already know to solve 2-step equations.
• 4. So, what’s first?
• You need to break up the equation into two steps .
• 5. STEP 1
• The first step will always be either adding or
• subtracting .
+ -
• 6. STEP 2
• The second step will always be either
• multiplying or dividing .
• ÷
• 7. Let’s try a problem.
• 8x + 5 = 61
This problem has addition, so we need to subtract first. - 5 - 5 Whatever we do on one side, we have to do on the other. 8x 56 =
• 8. Now, Step 2.
• 8x = 56
This problem has multiplication, so we need to divide now. Whatever we do on one side, we have to do on the other. 8 8 x = 7
• 9. Let’s try another problem.
• 3a - 8 = 4
This problem has subtraction, so we need to add first. + 8 + 8 Whatever we do on one side, we have to do on the other. 3a 12 =
• 10. Now, Step 2.
• 3a = 12
This problem has multiplication, so we need to divide now. Whatever we do on one side, we have to do on the other. 3 3 a = 4
• 11. Now you try some problems.
• Copy these problems onto a piece of paper.
• Break each problem into 2 parts to solve.
7f + 5 = 40 5q – 7 = 13 12t – 6 = 90 4y + 8 = -12
• 12. More Practice Problems
• The object is to get the variable by itself.
• Combine like terms first.