exam Maths Puzzle Numerical Ability

The difference between two numbers is 15. when twice the smaller number is subtracted from three times the larger number, the difference is 58. what is the larger number? Thank you...

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exam Other Question
From a base elevation of 6400 ft. a mountain peak in Colorado rises to a summit elevation of 14725 ft over a horizontal distance of 15841. Find the grade of the peak.

The grade of the peak is 52.55 % the conjugate of 1 + i^4 is
a) 0
b)1-i^4
C) 2
d)-2