book Maths Puzzle Numerical Ability

Make sure the final answer is simplified.


2/5+1/5 3/4+2/3 1/2-5/7 -12/7-3/14 5/8*4/10 2/9+5/3

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book Other Question

9x^2=64
9x^2=squre rt of 64
9x^2=8

I am stuck after this
3x-11y+5x+2y