2xy - xy - y + 7y - xy All the "xy" terms can combine. 2xy - xy - xy (Imagine there is a 1 in front of the variables— 2-1-1=0) Now you're left with the -y + 7y. Your answer after combining like terms is 6y.
4/7 can be considered a suspended division problem. To find the answer, 4 must be divided by 7. This yields the result 0.57142, which can be rounded to 0.6.
