Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 1 - Section 1.5 - Problem Solving and Using Formulas - Exercise Set: 57

Answer

$a=\dfrac{2A}{h}-b$

Work Step by Step

Multiply 2 to both sides: $2\cdot A=2 \cdot \frac{1}{2}h(a+b) \\2A = h(a+b)$ Divide by $h$ on both sides: $\dfrac{2A}{h} = \dfrac{h(a+b)}{h} \\\dfrac{2A}{h} = a+b$ Subtract $b$ on both sides: $\dfrac{2A}{h} - b= a \\a=\dfrac{2A}{h}-b$
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