已知|x-7|+|3x+2y-25|=0,求x与y的值
问题描述:
已知|x-7|+|3x+2y-25|=0,求x与y的值
答
Ix-7I=0 x=7; I3x+2y-25I=0,3x+2y-25=0 把x=7 代入得,21+2y-25=0 y=2
已知|x-7|+|3x+2y-25|=0,求x与y的值
Ix-7I=0 x=7; I3x+2y-25I=0,3x+2y-25=0 把x=7 代入得,21+2y-25=0 y=2