Oxygen treatment increases the amount of oxygen that flows into your lungs and bloodstream. If your COPD is very bad and your blood oxygen levels are low, getting more oxygen can help you breathe better and live longer.
Step-by-step explanation:
3x - 2y = β9
3xβ2y+2y=β9+2y
3x=2yβ9/3x^3
=2yβ9/3
x=2/3yβ3
4x + 3y = 22
4x+3y+β3y=22+β3y
4x=β3y+22
4x4
=β3y+22/4
x=β3/4y+11/2