Question

y-2x=1 6x-y-7 и они связаны

Answer 1

y-2x=1

6x-y=7

 

6x-y=7

y=6x-7

 

y-2x=1

6x-7-2x=1

4x-8=0

x=8/4

x=2

 

6x-y=7

6*2-y=7

12-y-7=0

y=5