X\(50+60)﹣X\(55+60)=6怎么解?
问题描述:
X\(50+60)﹣X\(55+60)=6怎么解?
答
X÷110-X÷115=6
X×(1/110)-X×(1/115)=6
X×{(1/110)-(1/115)}=6
X×(1/2530) =6
X =6×2530
X = 15180