4x + 5(x - 2) +12
4x + 5x - 10 + 12
9x + 2
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If: 4x+(-12) = 8 then 4x = 20 and x = 5
If: 3x+5 = 4x+1 Then: x = 4
10x-7=4x+5 +7 +7 10x=4x+12 -4x -4x 6x=12 /6 /6 x=2
6x + 5
(The original question was misphrased.) 4x-7 = 2x+5 resolves as 2x-7 = 5 2x = 12 x = 6