解方程:(x-100)÷60=x÷70+1

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解方程:(x-100)÷60=x÷70+1
解方程:(x-100)÷60=x÷70+1

解方程:(x-100)÷60=x÷70+1
(x-100)/60-1=x/70
(x-160)/60=x/70
60x=70(x-160)
(70-60)x=70*160
x=1120

1120

1120

x=1120

两边乘420
7x-7×100=6x+420
7x-6x=420+700
x=1120

520/3

答案:x=1120

112

(x-100) x
-------------- X 420 = -------- X 420 + 1X420
60 70

(x-100) X 7 = 6x+420
7x-700 =6x+420
7x-6x =420+700
x=1120

(x-100)÷60=x÷70+1
x/60-5/3=x/70+1
x/60-x/70=1+5/3
x/420=8/3
x=1120