20(x +5)=22.5x怎么解?
2个回答
展开全部
解:解方程,此方程的解为x = 40
20(x + 5) = 22.5x
20x + 100 = [(22×10+5)/10]x
20x + 100 = (225/10)x
20x + 100 = (45/2)x
(45/2)x - 20x = 100
(45/2)x - (40/2)x = 100
(5/2)x = 100
x = 100 ÷ 5/2
x = 100 × 2/5
∴x = 40
答:此方程的解为x = 40
20(x + 5) = 22.5x
20x + 100 = [(22×10+5)/10]x
20x + 100 = (225/10)x
20x + 100 = (45/2)x
(45/2)x - 20x = 100
(45/2)x - (40/2)x = 100
(5/2)x = 100
x = 100 ÷ 5/2
x = 100 × 2/5
∴x = 40
答:此方程的解为x = 40
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询