Here is the work for that problem:
5x+ 2=12
5x= 12-2
5x=10
x= 2
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(4, -2)
8x-7 plus 2x equals 6 plus 5x plus 2?
3x + 2 + 2x = 7; 3x + 2x = 5x, so 5x + 2 = 7; 7-2=5, so 5x=5. 5x divided by 5 and 5 divided by 5 equals 1, so x equals 1.
(3, 2)
x 5x-3x +6=-12, x 2x +6=-12,3x+6=-12, move the x and it's very easy 12/6=2 ...But the answer is negative so the x is equal to -2 and the answer is -12...I .