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Question 928725: Bruce bought two books. One boot costs 4 dollars more than 3 times the other. Together, the the two books cost him $72
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! x = dollar price of book A
y = dollar price of book B
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x = 3y + 4
x + y = 72
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put the system of linear equations into standard form
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x - 3y = 4
x + y = 72
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copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
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solution:
x = dollar price of book A = 55
y = dollar price of book B = 17
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