If p is the speed of the plane, and w is the speed of the wind, you have

p + w = 200

p - w = 120

You can find p by adding these equations

2p = 200 + 120 = 320

p = 160

From either equation,

w = 40

The speed of the

p + w = 200

p - w = 120

You can find p by adding these equations

2p = 200 + 120 = 320

p = 160

From either equation,

w = 40

The speed of the

**wind is 40 mph**, the speed of the**plane in still air is 160 mph**.