Solve the following system of equations:
1. x + 2y = 1
3(x + y) = -12

a) {-1; 3} b) {2; -4} c) {6; -3}
d) {2; -3} e) {-1; -3}


a) {-1; 3}
b) {2; -4}
c) {6; -3}
d) {2; -3}
e) {-1; -3}