4.2x+84=14.7 Помогите 7y-y-3y=61.2

Question

4.2x+84=14.7 Помогите
7y-y-3y=61.2

Answer 1

1.    4.2х+84=14.7
4.2х=-69.3
х=-69.3/4.2
х=-16.5
2.  7у-у-3у=61.2
3у=61.2
у=61.2/3
у=20.4