Question

Solve the system for the subsitution
x-4y=-8
5y-1=x

Answer 1

X=-36

Y=-7

Explanation:

If 5y-1=x

then you can substitute x into the first equation

x-4y=-8

as we know x=5y-1 then

(5y-1)-4y=-8 is true

5y-4y is just y

so we are left with y-1=-8

add 1 to both sides

y=-7

substitute this into other equation

5(-7)-1=X

-35-1=X

X=-36