(160-130)*x+(120-100)*(100-x)≥2580 怎么算,要求完整过程

问题描述:

(160-130)*x+(120-100)*(100-x)≥2580 怎么算,要求完整过程

(160-130)*x+(120-100)*(100-x)≥2580
30x+20(100-x)≥2580
30x+2000-20x≥2580
10x+2000≥2580
10x≥2580-2000
10x≥580
x≥58