Question

I have $175 in my wallet, consisting of $10 and $5 notes. the $10 notes are twice as much as $5 notes. Find the number of $5 notes.​

Answer 1

Answer:

7 $5 Notes

Step-by-step explanation:

Let x represent the number of $10 notes

Let y represent the number of $5 notes

We can use systems of equations to find the solution

$10x+5y=175\\x=2y$

We can solve by substitution

$10(2y)+5y=175$

$20y+5y=175$

$25y=175$

$y=7$

Plug back into original equation

$x=2(7)\\x=14$

Therefore, there are 14 $10 notes, and there are 7 $5 notes.

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