Question

25 points for grabs!

I have 1 bag of marbles. I put in 3 extra marbles. There are now 9 marbles in the bag. How many were in the bag to begin with?

Look I very obviously know that the answer is 6, however I would like the working out and just an explanation on how to do it. Please and thank you <3

Answer 1

• 6 marbles

Explanation:

Let the initial number of marbles be x

Then added 3 and got 9 as final number

Equation for this and solution

• x + 3 = 9
• x = 9 - 3
• x = 6