(A+) It takes a painter and his friend 8 hours to paint a room. If the painter was working alone, it would take him 12 hours les
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First, square both sides. This will cancel out the radical.
(a^2 = b + 6)
Then subtract 6 from both sides
b = a^2 - 6
(a^2 = b + 6)
Then subtract 6 from both sides
b = a^2 - 6