SOLUTION: I am needing help with a system of equations with 3 variables The first equation in this problem is 6q-r+2s=8 The second equation is 2q+3r-s=-9 The third equation is 4q+2r+5s= 1

Question 369070: I am needing help with a system of equations with 3 variables
The first equation in this problem is 6q-r+2s=8
The second equation is 2q+3r-s=-9
The third equation is 4q+2r+5s= 11
I am in Algebra 2 in high school and know how to use substitution and elimination.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
1.
2.
3.
You use elimination to reduce from 3 equations to 2 equations.
Multiply eq. 2 by 2 and add to eq. 1,

4.
Multiply eq. 2 by 5 and add to eq. 3,

5.
Multiply eq. 4 by -7 and add to eq. 5,

Then work backwards and substitute,
From eq. 4,

From eq. 1,

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