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Maths Puzzle
Numerical Ability
Now I have this problem:
solve the system by addition.
2x-4y=7
4x+2y=9
Ok so I subtract 2x-4x and get -2x
then I do -4y+2y=-2y
Now my problem looks like this;
-2x+-2y=7+9=
-2x+-2y=16
Now what?
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