
3.8x(40-X)=40-x+4怎么解
展开全部
解:解方程,此方程的解为x = 270/7
3.8x(40-X)=40-x+4
3.8 × 40 - 3.8x = 40 - x + 4
(3×10+8)/10 × 40 - [(3×10+8)/10]x = 44 - x
38/10 × 40 - (38/10)x = 44 - x
152 - (38/10)x = 44 - x
-x + (38/10)x = 152 - 44
-(10/10)x + (38/10)x = 108
(28/10)x = 108
(14/5)x = 108
x = 108 ÷ 14/5
x = 108 × 5/14
∴x = 270/7
答:此方程的解为x = 270/7
3.8x(40-X)=40-x+4
3.8 × 40 - 3.8x = 40 - x + 4
(3×10+8)/10 × 40 - [(3×10+8)/10]x = 44 - x
38/10 × 40 - (38/10)x = 44 - x
152 - (38/10)x = 44 - x
-x + (38/10)x = 152 - 44
-(10/10)x + (38/10)x = 108
(28/10)x = 108
(14/5)x = 108
x = 108 ÷ 14/5
x = 108 × 5/14
∴x = 270/7
答:此方程的解为x = 270/7
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
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