Question

{0,1x+3y=5 0.3x-7y=-1​

Answer 1

Объяснение:

{0.1х+3у=5 {0.7х+21у=35

{0.3х-7у=-1 {0.9х-21у=-3

_________

1.6х=32

х=20

14+21у=35

21у=21

у = 1

у= 1 ; х = 20