Question 713615
7/9=x/y
x+y=48
x=48-y
7/9=(48-y)/y cross multiply.
9(48-y)=7y
432-9y=7y
-9y-7y=-432
-16y=-432
y=-432/-16
y=27 ans.
x=48-27=21 ans.
Proof:
7/9=21/27
7*27=9*21
189=189