Question 984152
{{{z>0}}}
sign of y is uncertain.


{{{abs(x-y)=z}}}



CASE x-y>=0
x-y=z
x=z+y
trying x=7=z+y


CASE x-y<0
-x+y=z
-x=z-y
x=y-z
-3=y-z


Use these results as a system of equations:
{{{system(y+z=7,y-z=-3)}}}
Solve this for y and z.