Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 8 - Polynomials and Factoring - 8-1 Adding and Subtracting Polynomials - Practice and Problem-Solving Exercises - Page 478: 42


x = 8a - 2

Work Step by Step

To begin the problem, you need to put the values of the trapezoid's sides into an equation, and set it equal to 39a - 7. Make sure to include a variable for the side that you are solving for. I will be using X. It should come out similarly to how it is written on my paper. Next, simplify the terms so that you end up with (31a - 5) + x = 39a - 7 To finish the problem, you need to subtract (31a - 5) from both sides to get X alone, giving you your final answer of x = 8a - 2
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