Question

Solve the system of equations by substitution.
X=-4y
X+5y=2

Answer 1

It's simply:

x = (-8,2)

Answer 2

x= -4y let this be equation 1
x+5y=2 let this be equation 2

substitute equation 1 in 2

-4y + 5y = 2

y=2

substitute the value of y in equation 1

x= -4y
x= -4(2)
x= -8