(2X + 4)/2
factor out 2 from numerator
2(X + 2)/2
eliminate 2; top and bottom
X + 2
is the simplest form
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x(x + 2)
3x^2 + x + 2x^2 = 5x^2 + x
You can divide the integers in this case - 4 divided by 2 and 9 divided by 3. You would get 2 over x plus 3 over x. 4/2x + 9/3x = 2/x + 3/x = 5/x
-7 + 2(x-3) = -7+2x-6 = 2x - 13
the answer to this problem is -2x^2y^2