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(3/4)*x+12 = 5*(2*x+3/20) // - 5*(2*x+3/20)
(3/4)*x-(5*(2*x+3/20))+12 = 0
(3/4)*x-5*(2*x+3/20)+12 = 0
(3*x)/4-5*(2*x+3/20)+12 = 0
(-5*4*(2*x+3/20))/4+(3*x)/4+(4*12)/4 = 0
3*x-5*4*(2*x+3/20)+4*12 = 0
48-37*x-3 = 0
45-37*x = 0
(45-37*x)/4 = 0
(45-37*x)/4 = 0 // * 4
45-37*x = 0
45-37*x = 0 // - 45
-37*x = -45 // : -37
x = -45/(-37)
x = 45/37
x = 45/37
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