SOLUTION: pls help me to solve this equation by substitution.
1.-3x+3y=4
-x-2y=11
2.-3x-4y=2
3x+3y=-3
3.-5x-8y=17
2x-7y=-17
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Question 325290: pls help me to solve this equation by substitution.
1.-3x+3y=4
-x-2y=11
2.-3x-4y=2
3x+3y=-3
3.-5x-8y=17
2x-7y=-17
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
I'll do the first one to get you started. You should post one problem at a time.
# 1
Start with the second equation.
Add 2y to both sides.
Multiply every term by -1
Go to the first equation.
Plug in
Distribute.
Combine like terms on the left side.
Subtract from both sides.
Combine like terms on the right side.
Divide both sides by to isolate .
Go back to the previously isolated equation.
Plug in
Multiply
Subtract.
So the solutions are and which form the ordered pair )
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