1) 4/31) (7(х+у))/21 = (7(х+у))/21 = (7(х+у))/21 = (7(х+у))/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7/u2) (9а+12б)/3 = (9а+12б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3а+4б=u3) (5х-ху)/х = 5х/х - ху/х = 5 - у
1) 4/3
1) (7(х+у))/21 = (7(х+у))/21 = (7(х+у))/21 = (7(х+у))/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7(х+у)/21 = 7/u
2) (9а+12б)/3 = (9а+12б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3(3a+4б)/3 = 3а+4б=u
3) (5х-ху)/х = 5х/х - ху/х = 5 - у