Question
A jar cointains dimes and quarters .the total number of coins in the jar is 25 .the total value of the coins is $3.70 how many of each type of coin are in the jar
Answers
R_scott
d + q = 25
10 d + 25 q = 370
solve the system for d and q
... multiplying 1st equation ... 10 d + 10 q = 250
subtract equations to eliminate d ... 15 q = 120
10 d + 25 q = 370
solve the system for d and q
... multiplying 1st equation ... 10 d + 10 q = 250
subtract equations to eliminate d ... 15 q = 120