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=______.
答
x⊗(5⊗2)=74,x⊗(5×3+2×2)=74, x⊗19=74, 3x+19×2=74, &...
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, &...