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

2(5y - 1) + 4y = -4
2(-5y + 1) + 4y = -4
2x + 4(-5y + 1) = -4
2x + 4(5y - 1) = -4

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 

	2(5y - 1) + 4y = -4
	2(-5y + 1) + 4y = -4
	2x + 4(-5y + 1) = -4
	2x + 4(5y - 1) = -4

anonymous · Answer

a 2(5y - 1) + 4y = -4
	b 2(-5y + 1) + 4y = -4
	c 2x + 4(-5y + 1) = -4
	d 2x + 4(5y - 1) = -4

mathmale · Answer

Futuristic:  Please solve the first equation, -x + 5y = 1, for x.
Then substitute your new formula for x into the second equation, replacing x in the second equation with your formula for x.