Question

Даю 15б ток помогите

Answer 1

4/15:х=2/5
х=4/15:2/5
х=2/3

2/15у+3/4=5/6
2/15у=5/6-3/4
2/15у=1/12
у=1/12:2/15
y=15/24=5/8

5/8m-7/12m+5/6m=1/4
21/24m=1/4
m=1/4:21/24
m=6/21

Answer 2

ПОМОГИ ПЖЖ