book Maths Puzzle Numerical Ability

Evaluate the expression 10(log12 - log4). thankx

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book Other Question

A basket contains 5 apples. Do you know how to divide them to 5 kids so that each has one apple and one apple stays in the basket? I am supposed to find the value of x and y and do not know where to start. Here is the problem:

x-4y+22
2x+5y=-21