d is dimes. q is quarters.
d+q=86.
.1d +.25q = 14.60
Use the first equation to find d in terms of q.
d+q = 86
Subtract q from both sides.
d=86-q
Substitute that d value into the second equation.
.1(86-q) + .25q = 14.6
Multiply .1 by both terms in the ().
8.6 - .1q +.25q = 14.6
Combine the q's, subtract 8.6 from both sides.
.15q = 6
Divide both sides by .15
q=40
d = 86 - q = 86 - 40 = 46
If you need help understanding math so you can solve these problems yourself, then one on one online tutoring is the answer ($30/hr). If you need faster solutions with guaranteed detailed answers, then go with personal problem solving ($3.50-$5.50 per problem). Contact me at fcabanski@hotmail.com
(