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Verified answer

The parts of the sum are 55 and 80.

Step-by-step explanation:

Let,

'x' be the smaller part and

'y' be the greater part of the number.

The sum is x+y = 135.   --------(1)

The greater part y = x+25.  ---------(2)

Substitute (2) in (1),

⇒ x+(x+25) = 135

⇒ 2x+25 = 135

⇒ 2x = 110

⇒ x= 110/2

x = 55

The smaller part is 55.

Substitute x=55 in (2)

y = 55+25 = 80

The greater part is 80.