Problem: Charles has 5q+1 quarters and Richard has q+5 quarters. The difference in their money in dimes is
Answer Choices:
A. 10(q−1)
B. 2/5(4q−4)
C. 2/5(q−1)
D. 5/2(q−1)
E. none of these
Solution:
25​[(5q+1)−(q+5)]=25​(4q−4)=10(q−1).