Question

2/3 + x = 3 im doing this cuss its too short but thats the question

Answer 1

3 - 2/3 = 2 1/3  which is = to 7/3

so your answer is 2 1/3 (or in improper fractions 7/3)

Answer 2

This is an easy one.

first you move 2/3 to the other side

x=3-2/3

so you get

x=1/3