# Chapter 2 - Section 2.1 - The Addition Property of Equality - Exercise Set - Page 120: 47

x=5

#### Work Step by Step

7-5x+8+2x+4x-3=2+3$\times$5 First combine like terms (7+8-3)+(-5x+2x+4x)=2+3$\times$5 12+x=2+3$\times$5 Then multiply 12+x=2+(15) Then subtract 12 from both sides. x=2+15-12 x=17-12 x=5 Check the answer. 7-5(5)+8+2(5)+4(5)-3=2+3$]times$5 7-25+8+10+20-3=2+15 (-18)+8+10+20-3=17 (-10)+10+20-3=17 (0)+20-3=17 20-3=17 17=17

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