Question

The ratio of money in Brian's wallet to Colin's wallet one day was 7:2. Brian spent £39 that day. Brian now had £4 less than Colin. How much did Brian initially have?

Answer 1

£49.

Explanation:

Let the ratio of brain's money to Colin's is 7x : 2x.

From the given info:

7x - 39 = 2x - 4

5x = -4 + 39 = 35

x = 7

So initially Brian had 7*7 = £49.

Colin had £14.

Answer 2

Explanation:

Collin initially have 14

Step-by-step explanation:

Let

x------> money that Brian had initially

y------> money that Collin had initially

we know that

x/y=7/2

solve for x

x=7/2y -------> equation A

y-39=y-4 ------> equation B

substitute equation A in equation B

7/2y-39=y-4

7/2y-y=39-4

5/2y=35

y=14