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5(2a-2)=7(a+8)-27

 Dec 5, 2018
 #1
avatar+15350 
+1

5(2a-2)=7(a+8)-27   Use distributive property

10a-10 = 7a+56 - 27       Add 10 to both sides

10a  =  7a + 56- 27 + 10    Subtract 7a from both sides

10-7a = 56-27+10              simplify

3a = 39                          divide both sides by 3

a = 13

 Dec 5, 2018
 #2
avatar+55 
0

Its actually

10a-7a=56-27+10

3a=39

a=13

 Dec 5, 2018

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