Big Ideas Math - Algebra 1, A Common Core Curriculum

Published by Big Ideas Learning LLC
ISBN 10: 978-1-60840-838-2
ISBN 13: 978-1-60840-838-2

Chapter 1 - Solving Linear Equations - 1.2 - Solving Multi-Step Equations - Exercises - Page 16: 20

Answer

$h=-9$

Work Step by Step

$$\begin{align*} 5h+2(11)-2(h)&=-5 &\text{Apply the Distributive Property}\\ 5h+22-2h&=-5 &\text{Simplify.}\\ 3h+22&=-5 &\text{Combine like terms.}\\ 3h+22-22&=-5-22 &\text{Subtract 22 from each side.}\\ 3h&=-27 &\text{Simplify.}\\ \frac{3h}{3}&=\frac{-27}{3} &\text{Divide 3 to both sides.}\\ h&=-9&\text{Simplify.} \end{align*}$$ Check the answer by substituting $-9$ to the variable in the given equation. $$\begin{align*} 5h+2(11-h)&=-5\\ 5(-9)+2[11-(-9)]&\stackrel{?}{=}-5\\ -45+40&\stackrel{?}{=}-5\\ -5&\stackrel{\checkmark}{=}-5 \end{align*}$$ Thus, the solution is $h=-9$.
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