7.3(ⅹ一0.9)=21.9解方程给我发图片答案?
2个回答
展开全部
解:解方程, 此方程的解为x = 39/10,【即x = 3.9】
7.3(x - 0.9)= 21.9
7.3 × x - 7.3 × 0.9 = 21.9
(7×10+3)/10 × x - (7×10+3)/10 × 9/10 = (21×10+9)/10
(73/10)x - 73/10 × 9/10 = 219/10
(73/10)x - 657/100 = 219/10
(73/10)x = 2190/100 + 657/100
(73/10)x = 2847/100
x = 2847/100 ÷ 73/10
x = 2847/100 × 10/73
x = 39/10
∴x = 3.9
答:此方程的解为x = 39/10,【即x = 3.9】
7.3(x - 0.9)= 21.9
7.3 × x - 7.3 × 0.9 = 21.9
(7×10+3)/10 × x - (7×10+3)/10 × 9/10 = (21×10+9)/10
(73/10)x - 73/10 × 9/10 = 219/10
(73/10)x - 657/100 = 219/10
(73/10)x = 2190/100 + 657/100
(73/10)x = 2847/100
x = 2847/100 ÷ 73/10
x = 2847/100 × 10/73
x = 39/10
∴x = 3.9
答:此方程的解为x = 39/10,【即x = 3.9】
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