help with word problem

[maggiemo]

Joe has 26 coins consisting of quarters and dollar coins. The total value is $17
The problem states that q=quarters. I'm supposed to write an equation ____________________________=17
to find out how many quarters.
I tried making a table, but I am confused about value vs number of coins and making a problem to solve it.

 

[lookagain]

Joe has 26 coins consisting of quarters and dollar coins. The total value is $17
The problem states that q=quarters. I'm supposed to write an equation ____________________________=17
to find out how many quarters.
I tried making a table, but I am confused about value vs number of coins and making a problem to solve it.

You have:

Let $\displaystyle q =$ the number of quarters

Then $\displaystyle 26 - q =$ the number of dollar coins

A value of a quarter is worth $\displaystyle 0.25$ times the value of a dollar coin.

In this equation, we are leaving out the units of money in order not to clutter the equation as much.

You multiply the value of a coin by the number of each coin, respectively. Then you add those products

and set the sum equal to $\displaystyle 17 \ (dollars).$

The following equation includes representatiions of the total value of the quarters added
to the total value of the dollar coins to equal 17 dollars in total value.


$\displaystyle 0.25q + 1(26 - q) = 17$


Solve this equation for $\displaystyle q$ to find out the number of quarters.