If u have $25.65 in dimes and quarters, and you have 20 more quarters than dimes, how many dimes do you have?
0.25(x + 20) + 0.10x = 25.65
or
(0.25x + 20) + 0.10x = 25.65?
If u have $25.65 in dimes and quarters, and you have 20 more quarters than dimes, how many dimes do you have?
Let the number of dimes=D
Then number of quarters=D+20
.10D + .25(D + 20) =25.65
.10D + .25D + 5 =25.65
.35D =25.65 - 5 =20.65 divide both sides by .35
D =20.65 / .35
D=59 dimes
59 + 20 =79 quarters, so that:
[59 x .10] + [79 x .25]=$25.65
