False
12x - 66 = 3x + 9
12x - 3x = 9 + 66
9x = 65
x = 7.22
Check:
12(7.22) - 60 + 6 = 1(7.22) + 9 + 2(7.22)
86.64 - 66 = 7.22 + 9 + 14.44
20.64 = 30.66
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2x+2=x+6 first subtract 2x. -2x -2x2=-1x+6 then subtract 6-6 -6-4=-1x finally divide by -1x=4 X equals four.
2x - 6x + 3x = -412x - 3x = -41-1x = -41x = 41
x + 6 = 2x - 9 Add 9 to both sides: x + 15 = 2x Subtract 1x from both sides: 15 = 1x or 15 = x
2x-1=-32x=-3+1x=-2/2x=-1
it equals 13X.