Question

Galena is solving the following system.

mc026-1.jpg

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?
She added equation (1) instead of equation (2) in step 1.
She did not multiply equation (3) in step 1 by the correct value.
She did not multiply equation (3) in step 2 by the correct value.
She added equation (2) instead of equation (1) in step 2.

Answer 1

the system of equations didn't copy over correctly, would you mind re-typing the system, or taking a screen capture? we just need the system