Question

急！应用题，在线等答案

Mary has a long string.She first cut 7 cm from the string to make a knot,them she cuts the remaining part evenly into three shorter strings.If each smaller part is 28 cm long,find the length of the original string by the method of solving equation.

Answer 1

她切了7厘米以后，把剩下的绳子平均切成3段。每段28厘米。

所以绳子原来的长度是 28 X 3 + 7 = 91 cm

Answer 2

make the length of the original string = x,
(x-7)/3=28
x=91