Answers

2015-07-21T20:50:28+08:00
Let x = eraser x + 5 = pad paper x + 7 = pencil x+x+5+x+7 = 42 3x + 12 = 42 3x = 42-12 3x = 30 3x/3 = 30/3 x = 10 Eraser = x Eraser = 10 Pad paper = x + 5 PP = 10 + 5 PP = 15 Pencil = x + 7 Pencil = 10 + 7 Pencil = 17 10+15+17 = 42
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2015-07-21T20:51:21+08:00
Eraser= 10
pad paper= 15
pencil= 17

10 + 15 + 17 = 42
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