exam Maths Puzzle Numerical Ability

one number is 12 more then another, the sum of the smaller number and twice the larger number is 39 find the large number x= the first number and y= the second number so is it 12 + x = y or 2x +y = 32

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exam Other Question
determine the zeros of each quadratic relation
a) A=w(20-w)

b) y=2x(5x+6) We are in interval notation and I am havibg a hard time with. Could you please help?

We are to use interval notaion for the solution sets.

2<(5-2x)<7

Here is another one 2x-3<5 or 3x-2>13

Thanks