Word problems

Question

a space shuttle is used to launched either in the same direction or the opposite direction of the shuttle and the speed in kilometers per hr of both objects can be found by solving the equations. X+y=1200.      X-y=800

Answer 1

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Answer 2

 

x + y = 1200

x - y = 800

 

Add these 2 equations and get:

 

2x = 2000

 

Then x = 1000

 

Plug x = 1000 into top equation and get 1000 + y = 1200

 

Then y = 200