Select the equation that solves this problem:

Question

Eight coins (dimes and nickels) are worth 60 cents. How many dimes are
there?

Answer 1

d = the number of dimes, while 8-d equals the numbers of nickels, if you multiply the number of each coins by their value ( 10 cents or 5 cents ) and add them, you should get 60

Answer 2

got it

Answer 3

Select the equation that solves this problem:
Eight coins (dimes and quarters) are worth 170 cents. How many dimes are
there?
a. 10d + 25(11 - d) = 170
b. 10d + 25(8 - d) = 170
c. 10d + 5(8 - d) = 60
d. 10d + 5(11 - d) = 60

Answer 4

@seco -
Please post this as a New Question. The math tutors are unlikely to find it here.