SOLUTION: solve each of the systme by using either addition or substitution. If a unique solution does not exist, state whethere the system is dependent or inconsistent: 10x+2y=7 y

Algebra ->  Algebra  -> Coordinate Systems and Linear Equations -> SOLUTION: solve each of the systme by using either addition or substitution. If a unique solution does not exist, state whethere the system is dependent or inconsistent: 10x+2y=7 y      Log On

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Question 106911: solve each of the systme by using either addition or substitution. If a unique solution does not exist, state whethere the system is dependent or inconsistent:
10x+2y=7
y=-5x+3
Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
10x+2y=7
y=-5x+3
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Lets go ahead and use substitution since we already have what y equals, so we will substitute y=-5x+3 in the other equation for y;
10x+2(-5x+3)=7
10x-10x+6=7
6=7
Since both variables are eliminated, the system is inconsistent
:)