book Maths Puzzle Numerical Ability

How do you combine like terms like this? -5x+8+7x-11

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book Other Question

4 points ( 2 for determining points and 2 for the graph)
Graph the following inequality and shade it.
4X + Y > 4 ( , ) ( , ) Please answer the question in words describing and not graphed.
Help me solve....please!!!
X^2/x+1+2=1/x+1