exam Maths Puzzle Numerical Ability

How is this equation solved 7/8x + 1/4 =3/4x

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exam Other Question

Hi Can I have some help with this function?

Use the function to evaluate the indicated expressions and simplify.
f(x) = 8x + 3

f(x2) =
(f(x))2 =
What is the evaluation of this expression

13 - -4