8.EE.7 Checkpoint 1.1

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9

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CCSS.7.EE.B.4A

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18

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CCSS.6.EE.B.7

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CCSS.7.EE.B.4A

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-9

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CCSS.7.EE.B.4A

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CCSS.6.EE.B.7

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What does it mean to isolate a variable in an equation?

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To isolate a variable means to manipulate the equation so that the variable is on one side and all other terms are on the opposite side.

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Subtract 7 from both sides to isolate x.

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CCSS.6.EE.B.7

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What is the principle of equality in algebra?

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The principle of equality states that if you perform the same operation on both sides of an equation, the two sides remain equal.

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CCSS.HSA.REI.A.1

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How do you check if your solution to an equation is correct?

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Substitute the solution back into the original equation to see if both sides are equal.

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CCSS.6.EE.B.5

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What is a linear equation?

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CCSS.8.F.B.4

CCSS.HSF.LE.A.2