exam Maths Puzzle Numerical Ability

PLease help me check if I simplified:

a-8b/a+b+ a+13b/ a+b original problem



my answer-- 2a-5b/a+b

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exam Other Question

Find the percentage of the number.

10. 50% of 22


Any help with his equation would be Greatly</b> appreciated.
Determine whether the graph of 2 equations are perpendicular.

y=3X-7
4Y=3-x