exam Maths Puzzle Numerical Ability

1) A=1/2h(a+b)for a 2)what is 16% of 90?

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Please solve:

2/2-x + 3/x+2 = 2x/x^2 - 4

Thanks in advance! Hello, I don't know if you can help me, or maybe re-direct me to someone who could. I had a test question not long ago and I consider myself "okay" at math except this question has