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 colin initially have?

Collin initially have

Step-by-step explanation:

Let

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

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

we know that

solve for x

-------> equation A

------> equation B

substitute equation A in equation B

$3720

step-by-step explanation:

taxable income = $31000

as per the 2018-2019 us tax bracket, the tax rate is 12% for an individual whose taxable income is between $9,526 to $38,700.

so, the tax to be paid by him = 12% of 31000

= 0.12 * 31000     [12% converted to decimal as 0.12]

= $3720