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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

Respuesta :

mhanifa

Answer:

  • 6 marbles

Step-by-step 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

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