Решите уравнение (8/15 +2/9х) :3/5 =2
8/15+2/9х=3/5*2 8/15+2/9х=6/5 2/9х=6/5-8/15 2/9х=18/15-8/15 2/9х=10/15=2/3 х=2/3:2/9 х=2/3*9/2 х=3