book Maths Puzzle Numerical Ability

how do you get the x and y varibles in this problem
4x - 3y = 12
x + 2y = 14

Read Solution (Total 0)

book Other Question

{(x+2)-y}{(X+2)+y}

is this a perfect square
solve

The larger of two numbers is 2 more than 4 times the other. Their sum is 33. Their sum is 33. Find the two numbers.