www.fltk.net > 25%5x÷7=20求解方程?

25%5x÷7=20求解方程?

255X÷7=20 5x/7=25-205x/7=55x=35x=7

解:25-5x÷7=205x÷7=25-205x=5*7x=35÷5x=7

你好!25-5x÷7=20 5x÷7=5 5x=35 x=7如果对你有帮助,望采纳.

25-5x÷7=20解:5x÷7=25-205x=5*75x=35x=7

25-5x+7=2025+7-20=5x 5 X=12 X=2.4

5x = 7/20 ==> 5x * 20 = 7 ==> 100x = 7 ==> x = 7/100

第一个,原式=175-5x=14,x=32.5,第二个,39*(7/13+7/11)+39/11*7=39*7/13+39*7/11+39/11*7=21+(2*7*39)/11=70.636363…

5x÷7+2=25解:5x÷7=235x=23*75x=161x=161/5

25-5x÷7=2两边同乘以7得:175-5x=145x=175-145x=161x=161/5

5x=205x÷5=20÷5 x=4

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