Look carefully at the 2nd and 3rd of the given equations. Note that each of these two can be made identical to 3x + 2y = -12 through multiplication of each by a constant. Regarding the 2nd answer choice, if we multiply this equation by -1, we obtain 3x + 2y = -12. Regarding the 3rd answer choice, if we mult. this equation by 5, we get 3x + 2y = -12 again.
Thus, the 2nd and 3rd answer choice equation have the same solution as does 3x + 2y = -12.
