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4-((1/3)*(5-x)) = 2*(1-x)+1 // - 2*(1-x)+1
4-((1/3)*(5-x))-(2*(1-x))-1 = 0
(-1/3)*(5-x)-2*(1-x)-1+4 = 0
4-1/3*(5-x)-2*(1-x)-1 = 0
4-1/3*(5-x)-2*(1-x)-1 = 0
7/3*x-11/3-1+4 = 0
7/3*x-14/3+4 = 0
7/3*x-2/3 = 0
7/3*x-2/3 = 0
7/3*x-2/3 = 0 // + 2/3
7/3*x = 2/3 // : 7/3
x = 2/3/7/3
x = 2/7
x = 2/7
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