Question

What is the solution to the system of equations? Use the substitution meathod to solve. 6=-4x+y and -5x-y=21

Answer 1

6+4x=y or y=4x+6

Plug in to second equation: -5x-(4x+6)=21

-9x-6=21

-9x=27

x=-3

Plugging in, you get that y=-12+6 or -6.

Therefore, the solution is (-3,-6)