Luke can paint 91 portraits in 7 weeks.
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32 = x ⇒ write 32 as a power of 2
2⁵ = x
Then apply the log rule
⇒ 
We have 2⁵ = x
The 'a' is the digit '2'
The 'b' is the digit ''x
The 'c' is the digit '5'
Write this as a logarithm expression, we have
2⁵ = x
Then apply the log rule
We have 2⁵ = x
The 'a' is the digit '2'
The 'b' is the digit ''x
The 'c' is the digit '5'
Write this as a logarithm expression, we have