Question

Janson has quarters and dimes in his pocket. he counted 42 coins that added up to $7.50

Answer 1

I think Jason has 57

Answer 2

28 quarters and 5 dimes

7(Q)+5(D)

7(4)+5(10)

28Q 50D Q=quarters D=dimes

it would be more efficient to do the substitution method bc its faster and easier