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## Homework Statement

just started this semester, any help will be appreciated.

4x + 12y - 7z - 20w = 22

3x + 9y - 5z - 28w = 30

solve the system

## Homework Equations

well since I have more variables than equations I know theres an infinite number of solutions therefore Im gonna have to use parameters later on. (BTW can someone give me tips on how to do parameters?)

## The Attempt at a Solution

I have my matrix as follows

4 12 -7 -20 22

3 9 -5 -28 30

multiplying row_2 by -1 and adding it to row_1 I get

1 3 2 8 -8

3 9 -5 -28 30

multiplying row_1 by -3 and adding it to row_2 yields

1 3 2 8 -8

0 0 -11 -52 -54

then what? if I divide by 11 I start getting fractions, and the answer in the back doesnt have any fractions.

AFAIK you have to make the first one in each row 1 and have a zero below it. (condition on row_1 is met)