设全长为x
2x/7=45
x=157.5
某工程队修建一条高速公路,已经修建了全长的七分之五,还有45千米没有修成.这条高速公路有多长?
某工程队修建一条高速公路,已经修建了全长的七分之五,还有45千米没有修成.这条高速公路有多长?
数学人气:738 ℃时间:2019-10-20 19:43:51
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