book Maths Puzzle Numerical Ability

A coffee wholesaler blends together three types of coffee that sell for $1.95, $2.10, and $2.25 per pound so as to obtain 100 pounds of coffee worth $2.13 per pound. If the wholes

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book Other Question

Rita invested a portion of her retirement money of PHP 317, 000 at 9% and the remainder at 10&. If the total income is PHP 30,200, how much did she invest at each rate? Could someone help me with this one also please?
Solve for x without using decimals:

(2x + 3)^2 - (x - 2)^2 = 3