book Maths Puzzle Numerical Ability

Solve for X

4x^2+5x-7<12x^2+16x-10

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book Other Question

will you solve the following problems please?

1 3 # 3.w #5.Name like terms for : 5a+8-3a+11
# 1. - - -
2
5/(x+2) - 3X/(x^2-3X)=

5/(x+2)- 3X/(x(x-3))=

It is at this point where I have no earthly idea what to do next. What cancels out?