Answer:
They have 36 books in total.
Explanation:
Let d = The number of Dima's books
Let r = The number of Ramiro's books.
d = 2r
d - 12 = r Substitute 2r for d in the second equation and solve for r
2r - 12 = r Subtract 2r from both sides
2r - 2r - 12 = r - 2r
-12 = -r Multiply both sides by -1
12 = r
Ramiro has 12 books.
d = 2r substitute 12 for r and solve for d
d = 2(12)
d = 24
Dima has 24 books.
Together they have 36 books (12 + 24)
Helping in the name of Jesus.