tolong jawab pertanyaan saya dengan benar

4. A+B = 3x-2 + 2x-4 = 5x-6
B+A = 2x-4 + 3x-2 = 5x-6
6. A-B = 2x-1 - 1-x =x-2
B-A = 1-x - 2x-1 = -3x
7. A+B = 3x + 2x-1 = 5x+1
B+A = 2x+1 + 3x = 5x+1
8.A+B = 5 + 2x-4 = 1+2x
B-A = 2x-4 - 5 = 2x-9

Semoga membantu..maaf klo d yg salah...