(1) 3x+2y=5 ① ①+②×2:7x=21
2x-y=8 ② x=3 y= - 2
(2)1/3x-1/4y=1 →4x-3y=12 ① ①×3 - ②×4:7y=28
3x-4y=2 ② y=4 x=6