q = 2d
25q+10d = 360
Carina has twice as many quarters as dimes. If she has $3.60,
how many quarters does she have?
2 answers
q = 2 d
.25 q + .10 d = 3.6
.25(2 d) + .1 d = 3.6
.6 d = 3.6
6 d = 36
d = 6
so q = 12
.25 q + .10 d = 3.6
.25(2 d) + .1 d = 3.6
.6 d = 3.6
6 d = 36
d = 6
so q = 12