A bag contains 23 coins consisting of dimes and nickels. The total value of the coins is $1.85. Write a system of equations and solve to find out how many dimes are in the bag.

The number of dimes in a bag are required.
The number of dimes in the bag is 14.
Total value of coins is $1.85
Total number of coins is 23
Let number of dimes be [tex]x[/tex]
and number of nickels be [tex]y[/tex]
[tex]x+y=23[/tex] [tex]\times0.05[/tex]
[tex]0.1x+0.05y=1.85[/tex]
[tex]0.05x+0.05y=1.15[/tex]
[tex]0.1x+0.05y=1.85[/tex]
Subtracting the equations
[tex]-0.05x=-0.7\\\Rightarrow x=\dfrac{0.7}{0.05}\\\Rightarrow x=14[/tex]
The number of dimes in the bag is 14.
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