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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 25 Page 256

Use the Addition Property of Equality to eliminate the subtraction.

r=22

Practice makes perfect

To solve the equation, we have to isolate r on one side. Using the Addition Property of Equality, we will add 14 to both sides of the equation. This will eliminate the subtraction and isolate r.

8 = r -14
AddEqn

LHS+14=RHS+14

8+14=r-14+14
AddTerms

Add terms

22 =r
RearrangeEqn

Rearrange equation

r = 22

To check that this solution is correct, let's substitute r=22 into the original equation and simplify.

8 = r -14
Substitute

r= 22

8 ? = 22 -14
SubTerm

Subtract term

8=8 ✓

Since the left-hand side and right-hand side are equal, r=22 is the correct solution.

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arrow_right Try It p.252-254
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Try It 2 (Page 252)
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