exam Maths Puzzle Numerical Ability

solve and graph the following equations.

A)x - y = 2
3x + y = -6

B) x + y = 0
x - 4y = 2

C) x + 2y = -1
x - 4y = 1

D) 2x - 3y = 1
3x + y = 1

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exam Other Question

if their are 34times more nickles then dimes and 18times more pennies then dimes. how nickles do i have if their is $104.94. I need your help to solve for X & Y using the addition method.

4x-5y=7
-4x+5y=7