7x - 4 ( x - 3 ) = 12
7х - 4х + 12 = 12
3х = 12 - 12
3х = 0
х = 0
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7x - 4 ( x - 3 ) = 12
7х - 4х + 12 = 12
3х = 12 - 12
3х = 0
х = 0