2/3 x + 4/9 x = 3.2 x - 0.2 x = 8/15 решите

Question

2/3 x + 4/9 x = 3.2
x - 0.2 x = 8/15
решите

Answer 1

2/3х+4/9х=3,2
6/9х+4/9х=3,2
10/9х=3 2/10
х=32/10:10/9
х=32/10*9/10
х=288/100=2,88

х-0,2х=8/15
0,8х=8/15
х=8/15:8/10
х=8/15*10/8
х=10/15=2/3