Answer:
Addition equation means the equation which involves addition as an operation on both side of equality.
As, you don't have to use models or Drawing to solve the equation or find the value of the variable
So, with using that tool ,follow elementary rule of addition
That is ,
x = 5+11
x=16
Here we have added two like terms which are constants on RHS,to get the result.
→, x+2x=6
3 x=6
x=2
Added two like terms which are variables on the left and got the result.
