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Write and solve a system of equations that represents each situation. Interpret the solution. 
Neil has a total of twelve $5 and $10 bills in his wallet. He has 5 times as many $10 bills as $5 dollar bills. How many of each does he have?

Sagot :

Iloveonedirectionidn
x - $5 bills
y - $10 bills

x + y = 12
y = 5x

x + (5x) = 12
6x = 12
x = 2

y = 5(2)
y = 10

10 $10 bills and 2 $5 bills
Tadvisohil886idn
Let $5 bills be denoted by x and $10 bills be denoted by y.

[tex]x + y = 12 \\ y = 5x \\ \\ x + (5x) = 12 \\ \\ 6x = 12 \\ \\ => x = 2 \\ \\ y = 5x \\ \\ or, y = 5(2) \\ \\ => y = 10[/tex]

Thus, there are 2 5$ bills and 10 10$ bills.
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