Let's do some equations!

Exercise one:

if x=10 and y=20, what is the answer for: (x+y)/x?

Exercise two:

if a=69 and b=23, what is the answer for: (a-b)/b?

Exercise three:

if d=4 and e=11, what is the answer for: a+(d*a)?

Exercise four:

if g=34 and h=92, what is the answer for: (h+g)-g?

Have fun!