Solve for b
b=0
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7b=9b+6b
Combine 4b and 3b to get 7b.
7b=15b
Combine 9b and 6b to get 15b.
7b-15b=0
Subtract 15b from both sides.
-8b=0
Combine 7b and -15b to get -8b.
b=0
Product of two numbers is equal to 0 if at least one of them is 0. Since -8 is not equal to 0, b must be equal to 0.
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