Question

the sum of two number is 75 and diffrence is 15​

Answer 1

Let the two numbers be x, y

then x + y = 75      ......(1)

and x - y = 15         ......(2)

(1) + (2) = x + y + x - y = 75 + 15

⇒2x = 90

⇒ x = 45

(1) ⇒ x + y = 75

45 + y = 75

⇒ y = 30

Answer 2

Step-by-step explanation:

let the two numbers be 'x' and 'y'

x + y = 75

x - y = 15

.................................

2x + 0 = 90

..............................

2x = 90

x = 90/2

x = 45

substitute in any of the above equations

x + y = 75

45 + y = 75

y = 75 - 45

y = 30

so the two numbers are 45 and 30 respectively

hope it helps u.......

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