Question

Divide25 into two equal parts such that 7 times first part added to 5 times the second part makes 139.

Answer 1

Hi!

Here is the answer to your question.

Let the first part be x

So, the second part is 25 – x.

7 × first part + 5 × second part = 139

∴ 7x + 5 (25 – x) = 139

⇒7x + 125 – 5x = 139

⇒2x = 139 – 125 = 14

⇒x = 7

First part = 7

Second part = 25 – 7 = 18

Cheers!