book Maths Puzzle Numerical Ability

This new math sure gets me. I am a senior and trying to answer this question.
[2x(9+7)-4]/7=
Thank you.

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book Other Question

find the domain and the range of the following function

f(x) = 3x2+2 that is x squared thanks I need help with this homework my teacher gave me. She gave me a solution and have to find an equation that equals the solution. In the equation i have to include distributive prop