The answer i would pick is 2
Answer:
x is 30 because 4*30 is 120 and minus 2 is 118
I think you would distribute what is in the parentheses and then make it so only a and b are on the left and i and the other characters that can be simplified are on the left but feel free to Google it.
When you estimate, you round each number, the add.
We round them to
700+620, which is 1320
So our non estimated answer is 1323
But our estimated answer is 1320
900. You round up, because it is above 850. :-)
