t-1/3t-1/4t-1/5t=13怎样解
问题描述:
t-1/3t-1/4t-1/5t=13怎样解
答
t-1/3t-1/4t-1/5t=13
2/3t-(5+4)/20t=13
40t-27t=13*60
13t=13*60
t=60