exam Maths Puzzle Numerical Ability

sir,
i am doing B.Sc maths 1st at madurai kamaraj university through distance education.
i couldn't understand this problem.please explain me this problem

z=x+iy and comp(z-1

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exam Other Question

the hypotenuse of a right triangle is 15 inches. one of the legs is 3 inches more than the other. find the lengths of the two legs Solve the following systems by substitution. Example 2 (p 712) and Example 4 (p 713) are the key models to go by for solving these exercises�.

16) 5x - 2y = -5
y - 5x = 3