Two-Step Equations Word Problems

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What is a two-step equation?

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CCSS.7.EE.B.4A

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How do you isolate a variable in a two-step equation?

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To isolate a variable in a two-step equation, perform the inverse operations in reverse order. First, eliminate the constant term by adding or subtracting, then eliminate the coefficient by multiplying or dividing.

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CCSS.7.EE.B.4A

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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 'reduce' in a word problem?

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To 'reduce' in a word problem typically means to subtract or decrease a quantity. For example, '400 reduced by 2 times my age' means to subtract 2 times the age from 400.

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How can you set up an equation from a word problem?

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To set up an equation from a word problem, identify the unknown variable, translate the words into mathematical operations, and write an equation that represents the situation described.

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In the problem, 'You bought a magazine for $5 and four erasers for a total of $25', how do you express the cost of each eraser?

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CCSS.HSA.CED.A.3

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CCSS.7.EE.B.4A

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How do you determine the number of friends Sumalee has if she gave away 32 balls and has 8 left?

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CCSS.HSA.REI.A.1

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What is the equation for Jill's comic books problem?

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CCSS.HSA.CED.A.3