–18 + 15x = 3(4x – 6) + 3x

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asked Jan 28, 2018 217k views

2 Answers

Jonas Berlin · Answer 1 · 2018-01-30T23:26:17+0000

-18 + 15x = 3(4x - 6) + 3x; 3 × 4x= 12x; 3 × -6= -18; -18 + 15x = 12x - 18 + 3x; 12x + 3x= 15x; -18 + 15x = 15x - 18;
The answer is infinite solution.

Hope this helps :)

Erjiang · Answer 2 · 2018-02-02T07:22:46+0000

First we need to combine like terms:

-18 + 15x = 12x - 18 + 3x

-18 + 15x = 9x - 18

-18 = 9x - 18 - 15x

-18 = -6x - 18

0 = -6x (the 18's cancel)

0 / -6 = x

0 = x

–18 + 15x = 3(4x – 6) + 3x

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