2x-3y=-10 ①
1/2x+1/3=4 ②
1/2x+1/3 = 4 ②式 × 2 得
x+2/3 = 8
x = 8-2/3 = 22/3
2x-3y=-10 将 x =22/3 带入 ①式 得
44/3-3y = 10
44-9y = 30
9y = 44-30 = 14
y = 14/9 ； x = 22/3
好滴