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 Col
in. How much did Brian initially have?
2 answers:
Answer:
Step-by-step 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
Answer:
£49.
Step-by-step 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.
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