Question

If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalent to x from the first equation is substituted into the second equation.

−x + 5y = 1
2x + 4y = −4

Answer 1

2(5y-1) + 4y = −4

Explanation:

Answer 2

x = 5y - 1
2 ( 5y - 1 ) + 4y = - 4
10y - 2 + 4y = - 4
14y = - 2
y = - 1/7

x = 5 ( - 1/7 ) - 1
x = - 5/7 - 1
x = - 12/7
x = - 1 / 5 / 7