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Anonymous
18 x 12.12 = 218.16
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21618 multiplied by 12 is 216.
216
3(x + 2) = x - 18 3x + 6 = x - 18 3x - x = -18 - 6 2x = -24 x = -12
3x+12=x+48: 3x-x=-12+48 2x=36 x=18
4x+12-5x-30=-x-18
-6
4 [ 3 (x-6) ] = 12 4 [ 3x -18 ] = 12 12x - 72 = 12 12x = 84 x = 7