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(5/3)*(x-7) = (2/5)*x+1 // - (2/5)*x+1
(5/3)*(x-7)-((2/5)*x)-1 = 0
(5/3)*(x-7)+(-2/5)*x-1 = 0
5/3*(x-7)+(-2*x)/5-1 = 0
(5/3*5*(x-7))/5+(-2*x)/5+(-1*5)/5 = 0
5/3*5*(x-7)-2*x-1*5 = 0
19/3*x-175/3-5 = 0
19/3*x-190/3 = 0
(19/3*x-190/3)/5 = 0
(19/3*x-190/3)/5 = 0 // * 5
19/3*x-190/3 = 0
19/3*x-190/3 = 0 // + 190/3
19/3*x = 190/3 // : 19/3
x = 190/3/19/3
x = 10
x = 10
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