Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 2 - Solving Equations - 2-2 Solving Two-Step Equations - Practice and Problem-Solving Exercises - Page 92: 55

Answer

10.5

Work Step by Step

The measures of the two angles are equal so we can put them into an equation. 4x+3=45 (we subtract 3 from both sides of the equation) 4x+3-3=45-3 (simplify) 4x=42 (Divide each side by 4 to isolate the variable) x=42$\div$4=10.5 Thus, x=10.5
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