Question

УРАВНЕНИЕ !!! 815у - 310у +35у = 12 ПОМОГИТЕ!!

Answer 1

8/15y-3/10y+3/5y=1/2; 16/30y-9/30y+18/30y=15/30; 25/30y=15/30; y=15/30 : 25/30; y=90/150=9/15=3/5. y=3/5!!!! ^_^