SOLUTION: Solve the system by substitution.
3x - 3y = -12
y = -3x-12
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Question 110768: Solve the system by substitution.
3x - 3y = -12
y = -3x-12
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the given system
Plug in into the first equation. In other words, replace each with . Notice we've eliminated the variables. So we now have a simple equation with one unknown.
Distribute
Combine like terms on the left side
Subtract 36 from both sides
Combine like terms on the right side
Divide both sides by 12 to isolate x
Divide
Now that we know that , we can plug this into to find
Substitute for each
Simplify
So our answer is and
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