exam Maths Puzzle Numerical Ability

how do you write an equation for this function

the output is 5 more than 2 times the input.find the input when the output is 17

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exam Other Question

Write the equation of the line L satisfying the given geometric conditions.L has y-intercept (0,2) and is perpendicular to the line with equation 2x-3y = 6 With a certain tail wind a jet air craft arrives at its destination 1,890 miles away in 3 hours. Flying against the same wind, the plane makes the return trip in 3 3/8 hours. Find the windspeed and airspeed.