Question

A postman has to deliver 2,200 letters. The number of letters delivered in street A is twice the number delivered in street B. If he is left with 1,300 letters, then find the number of letters delivered by him in street A.

Answer 1

Given

Postman have total letters = 2,200

He delivered twice the letters on street A than street B .

Let he delivered total letters on street B = x

Then

He delivered total letters on street A = 2x

He delivered total letters on street A and B = 2,200 - 1300 = 900 letters

So,

x + 2x = 900

3x = 900

x = 300

So, he delivered total letters on street A = 2 × 300 = 600 letters

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Answer 2

2200=3A+1300
3A=2200-1300
3A=900
A=900/3
A=300