Solve by the substitution method.
-7x - 5y = 20
-3x + 3y = -12
A)(0, -4)
B)(0, -3)
C)(-1, -3)
D)No solution

Question

Solve by the substitution method.
-7x - 5y = 20 
-3x + 3y = -12
A)(0, -4)
B)(0, -3)
C)(-1, -3)
D)No solution

Quizplus · Accepted Answer

Solving the first equation for x gives x = (20 + 5y) / 7. Substituting this into the second equation gives -3((20 + 5y) / 7) + 3y = -12. Solving this equation for y gives y = -4. Substituting y = -4 into the first equation and solving for x gives x = 0. Therefore, the solution is (0, -4).

Solve by the Substitution Method