5x=-7+12x+4
5x=12x+(-7+4)
5x=12x-3
-7x=-3
(-7x)/-7=-3/-7
7x/7=-3/-7
x=-3/-7
x=3/7
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5x=-7+12x+4
5x=12x+(-7+4)
5x=12x-3
-7x=-3
(-7x)/-7=-3/-7
7x/7=-3/-7
x=-3/-7
x=3/7