exam Maths Puzzle Numerical Ability

is 14 the solution in of equation x+11=39

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exam Other Question

which of the following expressions represents the product of 3 less than twice x and 2 more than the quantity 3 times x? My teacher gave this problem

4x^-9
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4x^2+12x+9 divided by 6x-9

I got 3(2x+3), my teacher said I was wrong.Please help me.