1.315÷﹙1/5+25%﹚=700
2.1/4x+3/5x=7/20
5x+12x=7
17x=7
x=7/17
1.一个数的1/5和它的25%的和是315,求这个数.2.1/4x加3/5x=7/20 第二个是方程
1.一个数的1/5和它的25%的和是315,求这个数.2.1/4x加3/5x=7/20 第二个是方程
数学人气:577 ℃时间:2019-09-28 09:19:46
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