x=35-y
代入②式,得出:2(35-y)+4y=94
得出,y=12
所以,x=35-12=23.
方法二:
x+y=35即:x=35-y,
2(x+2y)=94即:x+2y=47即:x=47-2y
即:35-y=47-2y,即:y=47-35=12,x=23
x=35-y
代入②式,得出:2(35-y)+4y=94
得出,y=12
所以,x=35-12=23.
方法二:
x+y=35即:x=35-y,
2(x+2y)=94即:x+2y=47即:x=47-2y
即:35-y=47-2y,即:y=47-35=12,x=23