book Maths Puzzle Numerical Ability

A = B + 3 (4 - C)
If B equals 5 and C equals 2, what is the value of A?

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book Other Question

How many kilos of hard candies that is worth PHP 210 per kilo must be mixed with 12 kilos of chewy candies that is worth PHP 240 per kilo to produce an assortment of goodies that is worth PHP 230 per kilo? the equation x(squared)-x=0 has two solutions. whats the other?