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5*x-((2/3)*(x+5)) = 7*x-x+1 // - 7*x-x+1
5*x-((2/3)*(x+5))-(7*x)+x-1 = 0
(-2/3)*(x+5)+5*x-7*x+x-1 = 0
5*x-2/3*(x+5)-7*x+x-1 = 0
5*x-2/3*(x+5)-7*x+x-1 = 0
13/3*x-7*x+x-10/3-1 = 0
x-8/3*x-10/3-1 = 0
-5/3*x-10/3-1 = 0
-5/3*x-13/3 = 0
-5/3*x-13/3 = 0
-5/3*x-13/3 = 0 // + 13/3
-5/3*x = 13/3 // : -5/3
x = 13/3/(-5/3)
x = -13/5
x = -13/5
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