exam Maths Puzzle Numerical Ability

I have 24 questions the first question is solve the system of equation by graphing then classify the system

1. x+y=8
x-y=-6

2. 4x-y=27
4x+5y=-15

3. 7u+v=4

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exam Other Question

I painted a picture that is 4 inches longer than it is wide. If I put a 3 inch frame around my picture, the area increases by 96 square inches. What are the dimensions of my pictur how would i solve this: 2a^2(3a+5) and -4x^3(2x^2-9x)??? do i work in the parentheses 1st???