SOLUTION: if you have 55 quarters and dimes that equal 8.50 how many dimes and quarters are there

Question 1060707: if you have 55 quarters and dimes that equal 8.50 how many dimes and quarters are there
Answer by addingup(3677) (Show Source): You can put this solution on YOUR website!
q+d = 55 subtract d on both sides:
q = 55-d
-----------------------------
0.25q+0.10d = 8.50 substitute for q:
0.25(55-d)+0.10d = 8.50
13.75-0.25d+0.10d = 8.50 add/subtract d on left and subtract 13.75 on both sides:
-0.15d = -5.25 divide both sides by 0.15 and remember -/- = +
d = 35 you have 35 dimes and
(55-35 = 20) 20 quarters
-.-.-.-.-.-.-.-.-.-.-.-.-.-.
Check:
(35*0.10)+(20*0.25) = 8.50 use your calculator and you'll find that it's correct
:
John
RELATED QUESTIONS
50 coins in dimes and quarters have a total value of $11.00. How many dimes and quarters... (answered by josgarithmetic,greenestamps)

There is $4.65 in dimes and quarters, but eight more dimes than quarters. How many dimes... (answered by Edwin McCravy)

you have $13.80 in quarters and dimes. if you have 84 coins, how many are dimes? (answered by Edwin McCravy)

If you have 44 dimes and quarters with a total of $8.60, how many dimes are... (answered by Alan3354,Edwin McCravy)

Jill has $2.30 in dimes and quarters. There are 5 less dimes than quarters. How many... (answered by josmiceli)

You have a spare change jar containing 22 coins consisting of nickels, dimes and... (answered by ankor@dixie-net.com)

how many quarters are there if you have 105 coins ,37 are dimes, and 42 are nickels and... (answered by Simnepi)

Ron has $1.35 in dimes and quarters in his pocket. If there are twice as many dimes in... (answered by TimothyLamb)

If you have 34 coins, all nickels, dimes and quarters worth of $5.45. The number of... (answered by TimothyLamb)