Question 511821
multiply 1st eqn by 60 (3 * 4 * 5) ___ 45x + 40y = 420 (A)


multiply 2nd eqn by 80 ___ 48x - 40y = 1440 (B)


add eqn (A) and eqn (B), eliminating y ___ 93x = 1860


find x and substitute back to find y