Originally Posted by
masters Solve the first equation for x. That should be easy.
Substitute that value into the 3rd equation and solve for y. That shoudl be easy, too.
Finally, substitute x and y values in 2nd equation to find z.
Finished!
Solve the following system of equations using an algerbraic method. Check your answer.
3x=-12
1=x+y+2z
2x-y=-9
How would someone go about doing this