Line
2021-01-13
Theodore Schwartz
Skilled2021-01-14Added 99 answers
Step 1
Let x_1=x , x_2=y and x_3=z
So, the equations are:
2x-y-z=-3
3x+2y+z=13
x+2y+2z=11
Step 2
Let use eliminate z first. Add first two equations. That gives 5x+y=10
Step 3
Multiply first equation by 2 and add it to the third equation.
Add it to x+2y+2z=11
So we get 5x=5
So,
Step 4
We had 5x+y=10
Here we plug x=1 and find y
5(1)+y=10
Or, 5+y=10
Or, y=5
Step 5
In 2x-y-z=-3 we plug x=1 and y=5 and find z
2(1)-5-z=-3
Or, 2-5-z=-3
Or, -3-z=-3
Or, z=0
Result:
Jeffrey Jordon
Expert2021-11-11Added 2605 answers
Answer is given below (on video)
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