Answer:
y = - 2
Explanation:
Given
- 7(y - 1) = 21 ( divide both sides by the multiplier - 7 )
y - 1 = - 3 ( add 1 to both sides )
-7(y-1)= 21
-7y+7=21
-7y=21-7
-7y=14
divide by-7
y=-2
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