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