3pie+12mm is the correct answer (A)
4(5)=20
5(5)=25
4 groups of 6th grader
5 groups of 7th graders
The estimated total amount of the bill is $22. The total on the register is reasonable.
You said x + 2/5 = 12
It might be easier to handle if we use the decimal for 2/5.
x + 0.4 = 12
Subtract 0.4 from each side: x = 11.6
That's all there is to it. I'm sorry I can't make it
more complicated for you.
