求5\2m—(3\2M-1)+3(4-M)的值,其中M=-3化简与求值

问题描述:

求5\2m—(3\2M-1)+3(4-M)的值,其中M=-3化简与求值

=5\2m-3\2M+1+12-3m
=m+13-3m
=13-2m
其中M=-3
=13-2*-3
=13+6
=19