45*(x-2)=60*(x-1)怎么解?
问题描述:
45*(x-2)=60*(x-1)怎么解?
答
-90=15X-60
-90+60=15X-60+60
-30=15X
15X=-30
15X/15=-30/15
X=-2
答
45X-45*2=60X-60*1
45X-90=60X-60
45X-90-45X=60X-60-45X
-90=15X-60
-90+60=15X-60+60
-30=15X
15X=-30
15X/15=-30/15
X=-2