54y-36y-9=153, (15u-21)*3+27=234, (36t+98):14=25, (12u+30u+42):6+21 решите пожалуйста
54y-36y-9=153 54y-36y=153+9 18y=162 y=162/18 y=9 (15u-21)*3+27=234 45u-63+27=234 45u=234+63-27 45u=270 u=6 (36t+98)/14=25 36t+98=14*25 36t+98=350 36t=350-98 36t=252 t=352/36 t=7 (12u+30u+42)/6=21 12u+30u+42=21*6 12u+30u+42=126 12u+30u=126-42 42u=84 u=2