Posted by **Anonymous** on Tuesday, June 17, 2014 at 9:55pm.

Use back substitution to solve the system of linear equations

x-2y+z=8

y+z=5

z=2

**I tried to solve it eventho im still confused/lost.

1=3 idk ugh

- Math -
**Reiny**, Tuesday, June 17, 2014 at 10:07pm
well, let's put z=2 into the 2nd

z=y + 2 = 5

y = 3

So now we know that z=2 and y = 3

now into the 1st:

x - 6 + 2 = 8

z = 12

So, where was your problem with this ?

Looks very very easy.

- Math -
**Anonymous**, Tuesday, June 17, 2014 at 10:11pm
Thanks ...its easy for you because your good in math. IM not.

## Answer This Question

## Related Questions

- Substitution Method-Plz help - Use the Substitution method to solve the system ...
- Linear Equations - Can you please help solve this equation using the ...
- algebra - i need help with these problems (either a solution or how to plug them...
- maths - use the substitution method to solve the linear system. 1. 3x=9 -x+2y=9 ...
- Algebra 2 - Solve each system. x-4y-6z=-34 -7x+5y-7z=-24 z=5x-7y+18 These are my...
- math - If it says use the method of substitution to solve the system of linear ...
- Algebra - solving linear equations w/ substitution - The question in the book ...
- Math - Solve the system of linear equations by substitution: 1.) y=2x+3 y=3x+5 ...
- algebra - use method of substitution to solve the system of linear equations. 2x...
- HELP PLEASE - Solve the system of equations using matrices. Use Gaussian ...

More Related Questions