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Big Ideas Math: Modeling Real Life, Grade 6
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Big Ideas Math: Modeling Real Life, Grade 6 View details
2. Solving Equations Using Addition or Subtraction
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Exercise 24 Page 256

Use the Addition Property of Equality to eliminate the subtraction.

z= 16

Practice makes perfect

To solve the equation, we have to isolate z on one side. Using the Addition Property of Equality, we will add 3 to both sides of the equation. This will eliminate the subtraction and isolate z.

z-3=13
AddEqn

LHS+3=RHS+3

z-3+3=13+3
AddTerms

Add terms

z=16

To check that this solution is correct, let's substitute z= 16 into the original equation and simplify.

z - 3 = 13
Substitute

z= 16

16 - 3? = 13
SubTerm

Subtract term

13 = 13 ✓

Since the left-hand side and right-hand side are equal, z= 16 is the correct solution.

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