Question

Решите систему уравнений

Answer 1

х+3у = -3
2х-у = 10

х = -3 - 3у
2(-3-3у)-у = 10

-6-6у-у = 10
-7у = 16
у = -16/7


х+3у = -3
у = 2х - 10

х+3(2х-10) = -3
х+6х-30 = -3
7х = 27
х = 27/7

Answer 2

3•2x-3•y=3•10 x+3y=-3 6x-3y=30 x+3y=-3 7x=27 x+3y=-3 x=3 3+3y=-3 x=3 3y=-3-3 x=3 3y=-9 x=3 y=-3