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0.045*x-((5/8)*y) = 120 // - 120
0.045*x-((5/8)*y)-120 = 0
0.045*x+(-5/8)*y-120 = 0
0.045*x-5/8*y-120 = 0 // + -5/8*y-120
0.045*x = -(-5/8*y-120) // : 0.045
x = (-(-5/8*y-120))/0.045
x = 22.22222222*(120-(-5/8*y))
x = 22.22222222*(120-(-5/8*y))
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