解方程,2/3-8x=3+1/2x(x+1)-2(x-1)=1-3x(4-x)/3=(x-3)/5-12.4-(y-4)
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/25 14:50:17
解方程,
2/3-8x=3+1/2x
(x+1)-2(x-1)=1-3x
(4-x)/3=(x-3)/5-1
2.4-(y-4)/0.5=3/5y
2/3-8x=3+1/2x
(x+1)-2(x-1)=1-3x
(4-x)/3=(x-3)/5-1
2.4-(y-4)/0.5=3/5y
2/3-8x=3+1/2x
两边同乘6,得
4-48x=18+3x
4-18=3x+48x
-14=51x
x=-14/51
(x+1)-2(x-1)=1-3x
x+1-2x+2=1-3x
x-2x+3x=1-1-2
2x=-2
x=-1
(4-x)/3=(x-3)/5-1
两边同乘15,得
5(4-x)=x-3-15
20-5x=x-18
20+18=x+5x
6x=38
x=19/3
2.4-(y-4)/0.5=3/5y
两边同乘5,得
12-10(y-4)=3y
12-10y+40=3y
52=13y
y=4
两边同乘6,得
4-48x=18+3x
4-18=3x+48x
-14=51x
x=-14/51
(x+1)-2(x-1)=1-3x
x+1-2x+2=1-3x
x-2x+3x=1-1-2
2x=-2
x=-1
(4-x)/3=(x-3)/5-1
两边同乘15,得
5(4-x)=x-3-15
20-5x=x-18
20+18=x+5x
6x=38
x=19/3
2.4-(y-4)/0.5=3/5y
两边同乘5,得
12-10(y-4)=3y
12-10y+40=3y
52=13y
y=4
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