book Maths Puzzle Numerical Ability

this is the question:
prove that:
(x/a)+(y/b)=1

Read Solution (Total 0)

book Other Question

how do you solve 6r+s=9
3r=-2s by using augmentd matrices? Solve for the indicated variable:
2/w - y = z, solve for w

This is how I solved it, I'm I correct?
1/w = z + y/2

Thanks for your help