帮帮我一根绳子剪掉五分之一,在接上8米,结果比原来长60%,绳子原来长( )米
人气:246 ℃ 时间:2020-05-09 09:44:02
解答
绳子原来长(10)米
原来长x米
(1-1/5)x+8=(1+60%)x
1.6x-0.8x=8
x=10
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