SOLUTION: solve {3x-4y=8 {y=x-1

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Question 253858: solve
{3x-4y=8
{y=x-1
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
3x-4y=8 Start with the first equation.


3x-4%28x-1%29=8 Plug in y=x-1


3x-4x%2B4=8 Distribute.


-x%2B4=8 Combine like terms on the left side.


-x=8-4 Subtract 4 from both sides.


-x=4 Combine like terms on the right side.


x=%284%29%2F%28-1%29 Divide both sides by -1 to isolate x.


x=-4 Reduce.


y=x-1 Go back to the second equation.


y=-4-1 Plug in x=-4


y=-5 Subtract


So the solutions are x=-4 and y=-5 giving us the ordered pair (-4,-5)