Answer:
Justin has 27.50
Eva has $20
Emma has 15.50
Step-by-step explanation:
Let v = how much money Eva has
j = how much money justin has
Justin has $7.50 more that Eva
j = v+ 7.50
m= how much money Emma has
Emma has $12 less than Justin.
m = j-12
Together, they have a total of $63.00
Justin + Eva+ Emma = 63
j+v+m =63
Equations:
j = v+ 7.50 Solve this for v j-7.5 = v
m = j-12
j+v+m = 63
Substitute the first 2 equations in so this equation will be in terms of j
j + (j-7.5) + (j-12) = 63
Combine like terms
3j - 19.50 = 63
Add 19.50 to each side
3j-19.50+19.50 = 63+19.50
3j = 82.5
Divide by 3
3j/3 = 82.5/3
j =27.5
Justin has 27.50
Justin has $7.50 more that Eva
j = v+ 7.50
27.50 = v+7.50
Subtract 7.50 from each side
27.50-7.50 = v+7.5-7.5
20 =v
Eva has $20
Emma has $12 less than Justin.
m = j-12
m = 27.50 - 12
m = 15.50
Emma has 15.50
