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(4/5)*(x-1)+(3/5)*x = 2 // - 2
(4/5)*(x-1)+(3/5)*x-2 = 0
4/5*(x-1)+(3*x)/5-2 = 0
(4/5*5*(x-1))/5+(3*x)/5+(-2*5)/5 = 0
4/5*5*(x-1)+3*x-2*5 = 0
7*x-10-4 = 0
7*x-14 = 0
(7*x-14)/5 = 0
(7*x-14)/5 = 0 // * 5
7*x-14 = 0
7*x-14 = 0 // + 14
7*x = 14 // : 7
x = 14/7
x = 2
x = 2
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