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(1/3)*x+7 = -7*x-5 // + -7*x-5
(1/3)*x-(-7*x)+5+7 = 0
(1/3)*x+7*x+5+7 = 0
22/3*x+12 = 0 // - 12
22/3*x = -12 // : 22/3
x = -12/22/3
x = -18/11
x = -18/11
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