bird's air speed ---- x mph
wind speed -------- y mph
x+y = 3
x-y= 1.5
add them
2x = 4.5
x = 2.25 mph
y = 0.75 mph
with a tailwind, a bird flew at a ground speed of 3 mi/h. Flying the same path against the same wind, the bird travels at a ground speed of 1.5 mi/h. What is the bird's air speed? What is the wind speed?
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