SOLUTION: Sandra has some fives,tens and twenties. Altogether she has 27 bills worth $255. The number of tens is 6 more than the number of fives. Find the number of each type of bill she has

Question 928418: Sandra has some fives,tens and twenties. Altogether she has 27 bills worth $255. The number of tens is 6 more than the number of fives. Find the number of each type of bill she has.
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
x = number of fives
y = number of tens
z = number of twenties
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x + y + z = 27
5x + 10y + 20z = 255
y = 6 + x
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put the system of linear equations into standard form
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x + y + z = 27
5x + 10y + 20z = 255
x - y = -6
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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 = number of fives = 9
y = number of tens = 15
z = number of twenties = 3
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Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
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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