D = 7N
.10D - .05N = 5.85
Substitute 7N for D in the second equation and solve for N. Insert that value into the first equation to solve for D. Check by putting both values into the second equation.
dave throws loose change in to a cup an takes it out every 2 weeks
this time it is all nickels and dimes
there are 7 times as many dimes as nickels and the value of dimes is $5.85 more than the value of the nickels
how many nickels and dimes does dave have
1 answer
3 answers