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(2/15)*x+3 = -1/3 // + -1/3
(2/15)*x-(-1/3)+3 = 0
(2/15)*x+1/3+3 = 0
2/15*x+10/3 = 0 // - 10/3
2/15*x = -10/3 // : 2/15
x = -10/3/2/15
x = -25
x = -25
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