(1.8-8x)/1.2-(1.3-3x)/2-(5x-0.4)/0.3=0

问题描述:

(1.8-8x)/1.2-(1.3-3x)/2-(5x-0.4)/0.3=0

(1.8-8x)/1.2-(1.3-3x)/2-(5x-0.4)/0.3=0
(18-80x)/12-(1.3-3x)/2-(50x-4)/3=0
(18-80x)-6(1.3-3x)-4(50x-4)=0
18-80x-7.8+18x-200x+16=0
-80x+18x-200x=0-18+7.8-16
-262x=26.2
x=0.1

(1.8-8x)/1.2-(1.3-3x)/2-(5x-0.4)/0.3=0
(18-80x)/12-(1.3-3x)/2-(50x-4)/3=0
(18-80x)-6(1.3-3x)-4(50x-4)=0
18-80x-7.8+18x-200x+16=0
-80x+18x-200x=0-18+7.8-16
-262x=26.2
x=-0.1