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(1/3)*x-7/10 = -131/30 // + -131/30
(1/3)*x-7/10-(-131/30) = 0
(1/3)*x-7/10+131/30 = 0
1/3*x+11/3 = 0 // - 11/3
1/3*x = -11/3 // : 1/3
x = -11/3/1/3
x = -11
x = -11
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