book Maths Puzzle Numerical Ability

If possible, simplify the ratinoal expression.

2x - 3 / 4x - 6

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book Other Question

what do they mean by find the LCM of 2 certain numbers A chemist needs 70 milliliters of a 41% solution but has only 21% and 56% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.