速度!进进进!帮我解2道方程

来源:百度知道 编辑:UC知道 时间:2024/05/19 20:15:34
1.(10x+240)/120=(5x-80)/40
2.看图片

(10x+240)/120=(5x-80)/40
(10x+240)/3=(5x-80)
10x+240=15x-240
5x=480
x=96

(x-100)/50-2=(x+100)/60+5
(x-100)/50=(x+100)/60+7
6(x-100)=5(x+100)+7*300
6x-600=5x+500+2100
x=500+600+2100
x=3200

1.(10x+240)/120=(5x-80)/40
解:10x+240=15x-240
5x=480
x=96 .
2.(x-100)/50-2=(x+100)/60+5
(x-100)/50-(x+100)/60=7
6(x-100)-5(x+100)=2100
6x-600-5x-500=2100
x=3200 .

1.(10x+240)/120=(5x-80)/40
两边同时×120得
10x+240=15x-240
移项得
5x=480
x=96

2.(x-100)/50-2=(x+100)/60+5
两边同时×300得
6(x-100)-600=5(x+100)+1500
化简得
6x-1200=5x+2000
移项得
x=3200

1.x=96
2.x=3200

1.10x+240=15x-240
5x=580
x=96
2.6(x-100)-2*300=5(x+100)+5*300
6x-1200=5x+2000
x=3200