
Stephen K. answered 08/26/14
Tutor
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Physics PhD experienced in teaching undergraduates
Dominique,
First multiply by 5 the terms on the left and remove the ().
5·(x+3) = 10 becomes: 5·x + 15 = 10
Subtract 15 from both sides to get: 5·x = -5
Finally divide both sides by 5 to get: x = -1