x/2+y/3=3 7x-8y+4=0

问题描述:

x/2+y/3=3 7x-8y+4=0
求X,Y的值,
还有个+4呢!

3X+2Y=18 12X+8Y=72
7X-8Y=0
19X=72
X=72/19
Y=7*72/19/8=63/19