answer to this question

Question

Two friends are collecting baseball cards. Denis has 3 more than double the number of cards as his friend, Joshua. Together, they have 30 cards. Write an equation that can be used to determine j, the number of Baseball cards Joshua has.



Answer 1

D=3+2J

D+J= 30

3+2J+J =30

3J = 27

J = 9 cards

D = 21 cards