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Answer:
b = 7
Error is in first line of solution. It should read -24 + 4b = 4
Step-by-step explanation:
The error is in the first line of the solution which is the second line shown.
When you distribute a negative number, -4, you must multiply each number in the parentheses by that negative number, and all signs inside the parentheses change.
-4(6 - b) = 4
-24 + 4b = 4 <-------- this is the correct second line
4b = 28
b = 7