Question

1) {6x+5y=0
{2x+3y=-8

2) {9x+7y=95
{4x+y=34

Answer 1

{9х+7у=95
{4х+у=34 /×(-7)

{9х+7у=95
{-28х-7у=-238
способ сложения
9х+7у-28х-7у=95-238
7у зачеркиваем
-19х=143
х=143÷(-19)
х=-7