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x in (-oo:+oo)
14-(w/b) = (3*w)/4-21 // - (3*w)/4-21
14-(w/b)-((3*w)/4)+21 = 0
(-3/4)*w-(w/b)+14+21 = 0
35-3/4*w-(b^-1*w) = 0
x naleu017Cy do R
x in (-oo:+oo)
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