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(1/5)*(x+3) = (1/2)*(3*x-10) // - (1/2)*(3*x-10)
(1/5)*(x+3)-((1/2)*(3*x-10)) = 0
(1/5)*(x+3)+(-1/2)*(3*x-10) = 0
1/5*(x+3)-1/2*(3*x-10) = 0
1/5*(x+3)-1/2*(3*x-10) = 0
28/5-13/10*x = 0
28/5-13/10*x = 0
28/5-13/10*x = 0 // - 28/5
-13/10*x = -28/5 // : -13/10
x = -28/5/(-13/10)
x = 56/13
x = 56/13
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