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Solving linear equations and Inequalities

+2 votes
What is the solution of 2(x + 4) - x = 15?

Thankx :)
asked Dec 25, 2012 in ALGEBRA 2 by aangel Rookie

1 Answer

+1 vote

Ungroup terms uisng distributive property a(b+c) = ab + ac

2 * x + 2* 4 - x = 15

2x + 8 - x = 15

Group like terms using commutative property of addition a + b = b + a

2x - x + 8   = 15

x + 8 = 15

Apply subtraction proprty of equality; if a = b then a - c = b - c.

subtract 8 from each side

x + 8 -8 = 15 - 8

x = 7

I hope it helps!

answered Dec 26, 2012 by steve Scholar

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