x + 1 + 6x = x - 9
7x + 1 = x - 9
7x - x = - 9 -1
6x = - 10
x = - 10/6
x = - 5/3 atau - 1 2/3
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x + 1 + 6x = x - 9
7x + 1 = x - 9
7x - x = - 9 -1
6x = - 10
x = - 10/6
x = - 5/3 atau - 1 2/3