9x + 8 = 6x + 20
(- 8 from both sides)
9x = 6x + 12
(- 6x from both sides)
3x = 12
(divide both sides by 3)
x = 4
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9x+6 = 6x+15 9x-6x = 15-6 3x = 9 x = 3
no
this is the same as 6x - 2 = 6x - 2! There are an infinite number of possibilities for "x".
You can just add them together. The answer is 9x.
Well, darling, 3x plus 6y plus 6x simplifies to 9x + 6y. That's all there is to it, sugar. Math doesn't have to be complicated, just like your love life!