To simplify the expression \(3x (3-4)+3(+1)\), let's break it down step by step:
First, apply the multiplication:
\[3x \times (-1) + 3 \times 1\]
Now, simplify each multiplication:
\[ -3x + 3 \]
Finally, combine like terms:
\[ 3 - 3x \]
So, the simplified expression is \( 3 - 3x \).
