Solve each system using substitution.

Question

X=Y 

X-3y=4

Answer 1

Plug in y for x in the second equation.

y -3y = 4

-2y = 4

y=-2

So, x= -2

 

Check:

(-2) -3(-2) =?

-2+ 6 = 4         √ yes, it is correct.