SOLUTION: how do you solve this math problem : one online bookstore charges $10 per book and $8 for shipping. Another online bookstore charges $12 per book and offers free shipping. For what

Question 821918: how do you solve this math problem : one online bookstore charges $10 per book and $8 for shipping. Another online bookstore charges $12 per book and offers free shipping. For what number of books is the cost the same?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
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y = 10x + 8
y = 12x
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put the system of linear equations into standard form
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10x - y = -8
12x - y = 0
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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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answer:
x= 4
y= 48
if you purchase 4 books, you pay the same net cost of $48 for the books, regardless of which store you make your purchase from
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Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
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Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
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Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php
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