3.(2x-4) + 7 = 13
3.2x - 3.4 + 7 = 13
6x - 12 + 7 = 13
6x = 13 + 12 - 7
6x = 18
x = 18/6
x = 3
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3.(2x-4) + 7 = 13
3.2x - 3.4 + 7 = 13
6x - 12 + 7 = 13
6x = 13 + 12 - 7
6x = 18
x = 18/6
x = 3