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Question

two brothers are saving money to buy tickets to go to a concert. their combined savings is $55. one brother has $15 more than the other. how much has each saved?

Answer 1

Simultaneous equation:

 

x + y = 55

x + 15 = y

 

Substitute: x + x + 15 = 55

Simplify:    2x = 40

                 x = 20

By subtraction, y = 35