Решите уравнения: а) (3х+5х)*18=144б) (7y-5y)/8=17
1.8x*18=144 8x=8 x=1. 2.2y/8=17 2y=136 y=68.
(3х+5х)•18=144 8х•18=144 8х=144:18 8х=8 Х=8:8 x=1 8•1•18=144 144=144 (7y-5y):8=17 2y:8=17 2y=8•17 2y=136 y=136:2 y=68 2•68:8=17 17=17