若|2x-3|与|y+7|互为相反数,则x-y+3/2的值为
问题描述:
若|2x-3|与|y+7|互为相反数,则x-y+3/2的值为
答
|2x-3|+|y+7|=0
则2x-3=0 x=3/2
Y+7=0 y=-7
x-y+3/2=3/2-(-7)+3/2=10