规定A⊗B=3A+2B,如果x⊗(5⊗2)=74,那么x=_.

问题描述:

规定A⊗B=3A+2B,如果x⊗(5⊗2)=74,那么x=______.

x⊗(5⊗2)=74,
x⊗(5×3+2×2)=74,
           x⊗19=74,
     3x+19×2=74,
           3x=36,
            x=12;
故答案为:12.