exam Maths Puzzle Numerical Ability

In rectangle ABCD, diagonal AC abd BD intersect in E.
If AE=3x+y CE=20
BE=4x-2y Find x and y

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exam Other Question

Solve hte indicated system of equations by graphing. Interpert your graph and indicate the solution.

3x - y = 9

2x + y = 11

For part of it I have: 5x = 20 x = 4 Im not really sure what this would be under, but i really need help. The last class i was in, i did not get this question right, and i ended up flunking the class because i cant re