Question

помогите решить
7х=-81,9-2х
(5у-10)х(3у+6)=0

Answer 1

7х+2х=81.9
9х=81.9
х=81.9:9
х=9.1

Answer 2

15y=-10+6

Answer 3

15y=-4

Answer 4

y=15:-4

Answer 5

y=-375

Answer 6

Всё.