Question

解方程组,要过程3x+2y=8;2x+3y=7

Answer 1

3x+2y=8 (1)

2x+3y=7 (2)

(1)+(2)

5x+5y=15

x+y=3 (3)

(3)×3-(2)

x=2

(3)×2-(2)

-y=-1

y=1

x=2 y=1