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14-(w/8) = (3*x)/4-21 // - (3*x)/4-21
14-(w/8)-((3*x)/4)+21 = 0
(-3/4)*x-(w/8)+14+21 = 0
35-1/8*w-3/4*x = 0 // - 35-1/8*w
-3/4*x = -(35-1/8*w) // : -3/4
x = (-(35-1/8*w))/(-3/4)
x = 4/3*(35-1/8*w)
x = 4/3*(35-1/8*w)
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