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-16x - 10 = 9x + 5 - 18 - 2x
-16x - 10 = 7x - 13
-10+13 = 7x +16x
3 = 21x
3/21 = x
1/7 = x
-16x-9x+2x=10+5-18
-23x=-3 (multiplicas por -1 toda la ecuación)
23x=3
x=3/23