book Maths Puzzle Numerical Ability

If possible, simplify the ratinoal expression.

2x - 3 / 4x - 6

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book Other Question

solve

(-6x^4+3x^2-16) + (4x^2+4x-7)

please show work
thanks Thanks for your help sir.

The present age of A and B is in the ratio of 9:7. After 10 years, it would be in the ratio of 7:5. Find their present ages