book Maths Puzzle Numerical Ability

i apologize ahead of time if this is in the wrong cat.
how do you write an equation for this problem?
the sum of a number and five times the number??
when i see it my mind goes blank
any help would be appreciated

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book Other Question

Find the perimeter of a right triangle with one side 2cm and the hypotenuse 7cm. classify the given numbers as real and rational, real and irrational, or complex

(80)^1/5