3 Answered Questions for the topic Back-Substitution

Back Substitution Math Algebra 1 Algebra 2

02/13/20

#### Solve the system using Gaussian elimination and back-substitution. Help me please... this is all confusing

-x + 3y −  z = -9  x − 2y + 2z = 8 2x −  y +  z = 7
Back Substitution Matrix Augmented Matrix System

05/24/15

#### Write an augmented matrix for the system. Use row operations to put it in row ecjelon form. Find y then back substitute to find x.

2x+10y=-12 -3x+y=34I have the matrix and what to multiply it by except the last one. I'm really lost. Please help and show work.  2   10     -12     *1/2-3   1      34   1    5     -6    *3 -3... more
Back Substitution Matrix Augmented Matrix System

05/24/15

#### Write an augmented matrix for the system. Use row operations to put it in row ecjelon form. Find y then back substitute to find x.

x+3y=-18 3x-y=16 I have the matrix but i'm lost on the rest of it. Please show work.   1  3  -18 3 -1   16

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