Hot issues：
This module collects the frequently encountered and difficult problems for reference only.
This module collects the frequently encountered and difficult problems for reference only.
Current location：Hot issues > Answer
规定一种运算*，有a*b=a－b＋a×b。如果9*x=41，求x的值。
由定义可知： 9*x=9-x+9\times x
又因为
9*x=41
所以
\begin{align}
&9-x+9\times x=41\\
=>\ &8x=32\\
=>\ &x=4
\end{align}
所以，所求的x的值为：x=4