Question

今天上课讲了化简字母公式,还是不太懂,求大神解答下面几道题并教我怎么算

Answer 1

=5（3m+2m)=5(5m)

= a/15+2/15

=30-30b

=5n*4+5n*6=20n+30n

=y (4*0.25)=y

=1.4x+2