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(1/3)*x+1 = 3*x-37/3 // - 3*x-37/3
(1/3)*x-(3*x)-(-37/3)+1 = 0
(1/3)*x-3*x+37/3+1 = 0
40/3-8/3*x = 0 // - 40/3
-8/3*x = -40/3 // : -8/3
x = -40/3/(-8/3)
x = 5
x = 5
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