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5 = (-4/7)*x // - (-4/7)*x
5-((-4/7)*x) = 0
(4/7)*x+5 = 0
4/7*x+5 = 0 // - 5
4/7*x = -5 // : 4/7
x = -5/4/7
x = -35/4
x = -35/4
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