一元一次方程的解

来源:百度知道 编辑:UC知道 时间:2024/09/21 11:15:38
X/0.7+(0.2X-0.
17/0.03)=1

X/0.7+(0.2X-0.17)/0.03=1
10X/7+(20X-17)/3=1
30X+140X-119=21
170X=140
X=14/17


X/0.7+(0.2X-0.17/0.03)=1
整理得10X/7+(X/5-17/3)=1
10X/7+X/5=20/3
解得X=700/171

X/0.7+(0.2X-0.17/0.03)=1
x*10/7+0.2x-17/3=1
10/7x+1/5x-17/3=1
57/35x-17/3=1
57/35x-17/3+17/3=1+17/3
57/35x=20/3
57/35x/(57/35)=20/3/(57/35)
x=700/171

10X/7+X/5-17/3=1
57X/35=20/3
X=700/171

X/0.7+(0.2X-0.17/0.03)=1
(10/7)X+1/5X-17/3=1
(50/35+7/35)X=20/3
X=(20/3)*(35/57)
X=700/171

10X/7+(X/5-17/100)/0.13=1
10X/7+20X/13-17/13=1
130X+140X-17*7=7*13
270X=210
X=7/9