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how do you do substitution with these equations?

700,000 + 5,000x = y

and 

600,000 + 10,000x = y

Guest Mar 2, 2017
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700,000 + 5,000x = y

and 

600,000 + 10,000x = y

 

So

600,000 + 10,000x = 700,000 + 5,000x

 

Solve for x:

10,000x = 100,000 + 5,000x

5,000x = 100,000

x = 20

 

Plug in x to find y:

700,000 + 5,000(20) = y

700,000 + 100,000 = y

800,000 = y

hectictar  Mar 2, 2017

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