Question

x=y+4+2x-3y=5怎么解解？

Answer 1

x=5
y+4+2x-3y=5
y+4+2*5-3y=5
14-2y=5
9=2y
y=4.5

Answer 2

{x=y+4，① 2x-3y=5；②
解：把①代入②，得
2(y+4)-3y=5
2y+8-3y=5
2y-3y=5-8
-y=-3
y=3
把y=3代入①，得
x=3+4
x=7.
所以
{x=7，y=3.