Question

X减5的绝对值加Y加3的绝对值等于0,求X加Y X减Y的值

Answer 1

|x-5|+|y+3|=0

x-5=0,y+3=0

x=5,y=-3

x+y

=5+(-3)

=5-3

=2

x-y

=5-(-3)

=5+3

=8