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(1/2)*x-(6/5) = (-7/2)*x-7 // - (-7/2)*x-7
(1/2)*x-((-7/2)*x)-(6/5)+7 = 0
(1/2)*x+(7/2)*x-6/5+7 = 0
4*x+29/5 = 0 // - 29/5
4*x = -29/5 // : 4
x = -29/5/4
x = -29/20
x = -29/20
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