Explain how you could use a number line to show that -4 + 3 and 3 + (-4) have the same value

If anyone has done the algebra 2 chaos theory portfolio would you be wiling to me? i kind of know what i'm doing i just don't know if i'm doing it right.

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?