SOLUTION: bOB HAS 60 COINS CONSISTING OF QUARTERS AND DIMES.tHE COINS COMBINED VALUE IS $9.45. FIND OUT HOW ARE QUATERS AND MANY DIMES.

Question 268974: bOB HAS 60 COINS CONSISTING OF QUARTERS AND DIMES.tHE COINS COMBINED VALUE IS $9.45. FIND OUT HOW ARE QUATERS AND MANY DIMES.
Found 2 solutions by drk, JBarnum:
Answer by drk(1908) (Show Source): You can put this solution on YOUR website!
we need two equations
(i)
(ii)
step 1 - multiply (i) by -10 to get
(iii)
step 2 - add (ii) and (iii) to get
(iv)
step 3 - divide by 15 to get
(v)
Since Q =23, we know that
(vi)
Answer by JBarnum(2146) (Show Source): You can put this solution on YOUR website!
where 60=total coins and D is the number of dimes and Q is the number of quarters. the value of C=9.45 so the value of Q+ the value of D= the value of C. to make this a bit easier to see the value of quarters =Q(.25) , the value of dimes =D(.10) , and the value of the total coins =9.45
this equation looks like:
now you have 2 equations and now u can use the substitution method to find your answers.
_______________
Equations:

so
_____________________

23 Quarters
____________________

37 Dimes
_____________________
Check answer

correct

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