Question

Adrian's sister took 15 marbles out of a bag and then gave the rest to her brother. The bag her brother received had 35 marbles in it. How many marbles were in the bag to begin with? Solve this equation: n - 15 = 35

Answer 1

you could just do 35+15. which would be 50 marbles

Answer 2

there were 50 marbles, to begin with