Answer:
see below
Step-by-step explanation:
to express x as a function of y we need to form this
[tex]y=mx+b[/tex]
and to express y as a function of x
[tex]x=ay+c[/tex]
so we work
1)
[tex]2000=20x+10y\\\\2000-20x=10y\\\\y=-2x+200[/tex]
2)
[tex]2000=20x+10y\\\\2000-10y=20x\\\\x=-\frac{1}{2}x+100[/tex]
