已知3m=4,3n=5,求3(2m+3n+1)的值.

问题描述:

已知3m=4,3n=5,求3(2m+3n+1)的值.

3(2m+3n+1)
= 6m+9n+3
= 2·3m + 3·3n + 3
= 2×4+3×5+3 = 26