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Big Ideas Math: Modeling Real Life, Grade 8

BI

Big Ideas Math: Modeling Real Life, Grade 8 View details

Cumulative Practice

Exercise 8 Page 195

Gather all of the variable terms on one side of the equation and all of the constant terms on the other side.

6

To find the value of x which makes the given equation true, we have to solve this equation. To do this, we should first gather all of the variable terms on one side and all of the constant terms on the other side using the Properties of Equality.

7 + 2x = 4x - 5

LHS+5=RHS+5

12 + 2x = 4x

LHS-2x=RHS-2x

12 = 2x

Rearrange equation

2x = 12

.LHS /2.=.RHS /2.

x = 6

The value of x which makes the given equation true is 6.

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