4. My Favorite Mistake Describe and correct the error in solving for one of the variables in the system:
8x + 2y = -12 and 5x - y = 4
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Step 1 5x - y = 4
y = -5x + 4
y=5x-4
Step 2 5x - (5x - 4) = 4
5x -5x + 4 = 4
4 = 4
The mistake made was she
To fix this mistake, Ms. Polo should have

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