For the actual solving of this problem gotta know:
PEMDAS
Parentheses - Perform Operation Inside Parentheses Exponent- N/A here Multiplication/Division - From Left to Right; So where 2(3) does = 6; you have to divide first before multiplying. The way you did it actually has a historical precedent that before 1917 would have been correct (watch here, you need sound for the end, as he explains why):
Addition/Subtraction - N/A as this was done in the parentheses
Math is a wonderful thing:
Substitute X for (2+1) and Y as the unknown
6/2X=Y
Remove 2X from the left side by multiplying both sides by 2X
6= 2XY
Divide both sides by 2
3=XY
Replace 2+1 for X
3=(2+1)*Y
Solve for Parenthesis
3=3Y
Divide both sides by 3
1=Y
Actually, I am pretty sure the left one is correct:
The problem here is the programming in the Calculator. Classic vs Math Print mode
Read more here if interested:
https://en.wikipedia.org/wiki/Order_of_operations
For the actual solving of this problem gotta know:
PEMDAS
Parentheses - Perform Operation Inside Parentheses
Exponent- N/A here
Multiplication/Division - From Left to Right; So where 2(3) does = 6; you have to divide first before multiplying. The way you did it actually has a historical precedent that before 1917 would have been correct (watch here, you need sound for the end, as he explains why):
Addition/Subtraction - N/A as this was done in the parentheses
So steps:
9 is the correct answer!
Math is a wonderful thing:
Substitute X for (2+1) and Y as the unknown
6/2X=Y
Remove 2X from the left side by multiplying both sides by 2X
6= 2XY
Divide both sides by 2
3=XY
Replace 2+1 for X
3=(2+1)*Y
Solve for Parenthesis
3=3Y
Divide both sides by 3
1=Y
Next talk about lies, damn lies and statistics.
You know it