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5*x+3/10 = (2/3)*x-1 // - (2/3)*x-1
5*x-((2/3)*x)+3/10+1 = 0
5*x+(-2/3)*x+3/10+1 = 0
13/3*x+13/10 = 0 // - 13/10
13/3*x = -13/10 // : 13/3
x = -13/10/13/3
x = -3/10
x = -3/10
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