Solve the equation justin has 5.50 more than eva emma has $10 dollars less than justin how much does if they have if the have 67.00

In solving this type of problem always look for the person you don't have any information about in this case  it's Eve therefore Eve is X, Justin has $7.50 more than Eve, therefore 
X+$7.50 is Justin and Emma has $12 less than Justin, therefore subtract $12 from Justin X+$7.50-$12, since the total amount is $63 add all the numbers and equal them to $63.
x+7+x+7.5-12+ x=63
3x+3=63
3x=60
x=20
Plug in the x for each person
therefore Eve=$20
Justin=$20+$7.50= $27.50
Emma has $12 less than Justin therefore $15.50
Add all the money and it equals $63

Step-by-step explanation:

Associative Property

Commutative Property

Distributive Property