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# Math Dictionary

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### Transcript

• 1. Math Dictionary #3
By: Sabrina and Cienna
• 2. Equations
To solve an equation we always do the opposite operation on both sides.
When solving a two-step equation you have to follow the order of operations backwards to find the operation you undo first.
Subtracting- minus, difference, decrease, fewer than, less than
Multiplying- times, product, of
Dividing- divide, quotient, per
• 3. Inequalities
Inequality- a math statement without an equal sign and with a &gt;, &lt;, &gt;, &lt; sign
You solve an inequality the same way you solve an equation.
You reverse the inequality symbol when you multiply or divide by a negative number.
• 4. Equations & Inequalities Problem #1
X + 24 = 31
• 24 -24
X = 7
7 + 24 = 31
• 5. Equations & InequalitiesProblem #2
-3a = 81
-3 -3
A = -27
-27 * (-3) = 81
• 6. Equations & InequalitiesProblem #3
2x + 10 = 46
-10 -10
2x36
2 2
X = 18
18 * 2 = 36
36 + 10 = 46
• 7. Equations & InequalitiesProblem #4
Y / 9 = 14
(9)
Y = 126
126 / 9 = 14
• 8. Equations & InequalitiesProblem #5
C – 12 = 26
+ 12 +12
c = 38
38 – 12 = 26
• 9. Equations & InequalitiesProblem #6
-6y &gt; -96
-6 -6
Y &gt; 16
16 * (-6) = -96
• 10. Equations & InequalitiesProblem #7
X – 14 &lt; 35
+ 14 +14
x &lt; 49
49 – 14 = 35