## Precalculus (6th Edition) Blitzer

$(2,-3)$
Re-arrange the given two equations and then use the addition method to get $(20x+12y)+(-9x-12y)=4+18$ This gives: $11x=22$ or, $x=2$ when $x=2$ then we have $5(2)+3y=1 \implies y=-3$ Hence, our answers are: $(2,-3)$