Question

Solve the system of equations by using substitution.

6r + 7s = -1
2r + 4s = -12


a. (-4,-8)
b. (-8,-4)
c. (-7, 8)
d. (8, -7)​

Answer 1

d. (8,-7)

Explanation:

First solve for one of the variables, I chose r so there were no fractions. Then plug r into the other equation and solve for s. then plug your solved s value into the equation in which you solved for r to obtain the value of r. (r,s) = (8,-7)