Raquel and her brother Marcus are huge sports fans. Combined they own 15 sports jerseys. Raquel owns double the amount of Marcus's jerseys plus an additional three. Use x to represent Marcus's amount of jerseys and y to represent Raquel's amount of jerseys.

-- Marcus

-- Raquel

Step-by-step explanation:

Given

-- Both

-- Raquel

Required

Determine x and y

Substitute 2x + 3 for y in

Collect Like Terms

Divide both sides by 3

Substitute 4 for x in

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so:

take it another