Mathematics, 18.11.2019 09:31 Savageboyn

Galena is solving the following system. 3x+2y+3z =5 7x+y +7z=-1 4x-4y-z=-3
step 1 she multiplies equation (3) by 3 and adds it to equation (1)
step 2 she multiplies equation (3) by -7 and adds it to equation (2)
which statement explains galena’s mistake?
1 she adds equation 1 instead of equation 2 in step 1
2 she does not multiply equation 3 in step 1 by the correct value
3 she did not multiply equation 3 in step 2 by the correct value
4 she added equation 2 instead of equation 1 in step 2

Answers: 3

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Galena is solving the following system. 3x+2y+3z =5 7x+y +7z=-1 4x-4y-z=-3
step 1 she multipl...

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