exam Maths Puzzle Numerical Ability

Please help to simplify

a

DIVIDED BY

b + 1/1 + c/x

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exam Other Question

A mayoral election race is tightly contested. In a random sample of 1,100 likely voters, 572 said that they were planning to vote for the current mayor.

Based on this sample, w 6^x=216. i know the answer is three but how do you find that algebraically?