Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$9+9++9+9+9+$$

Answer

45

Solution


Simplify.
\[9+9+9+9+9+\]
Simplify  \(9+9\)  to  \(18\).
\[18+9+9+9\]
Simplify  \(18+9\)  to  \(27\).
\[27+9+9\]
Simplify  \(27+9\)  to  \(36\).
\[36+9\]
Simplify.
\[45\]
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