8:5=(x-7):15,x=?
问题描述:
8:5=(x-7):15,x=?
答
8*15=5(X-7)
120=5X-35
5X=155
X=31
8:5=(x-7):15,x=?
8*15=5(X-7)
120=5X-35
5X=155
X=31