用整体思想法解方程1:2/3(t-1)=1-1/3(t-1) 2:-5(2/3x-1/2)=6(2/3-1/2)-5.5
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/19 19:53:38
用整体思想法解方程1:2/3(t-1)=1-1/3(t-1) 2:-5(2/3x-1/2)=6(2/3-1/2)-5.5
用整体思想法解方程
1:2/3(t-1)=1-1/3(t-1) 2:-5(2/3x-1/2)=6(2/3-1/2)-5.5
用整体思想法解方程1:2/3(t-1)=1-1/3(t-1) 2:-5(2/3x-1/2)=6(2/3-1/2)-5.5
1:2/3(t-1)=1-1/3(t-1)
2/3(t-1)+1/3(t-1)=1
t-1=1
t=2
2:-5(2/3x-1/2)=6(2/3x-1/2)-5.5
-5(2/3x-1/2)-6(2/3x-1/2)=-5.5
-11(2/3x-1/2)=-5.5
2x/3-1/2=1/2
2x/3=1
x=3/2
1、(2/3)(t-1)=1-(1/3)(t-1)
原方程可化为
(2/3)(t-1)+(1/3)(t-1)=1
(2/3+1/3)(t-1)=1
t-1=1
t=2
2、-5(2/3x-1/2)=6(2/3-1/2)-5.5
原方程可化为
-5*(2/3)x+5*(1/2)=6*(2/3)-6*(1/2)-5.5
-5*(2...
全部展开
1、(2/3)(t-1)=1-(1/3)(t-1)
原方程可化为
(2/3)(t-1)+(1/3)(t-1)=1
(2/3+1/3)(t-1)=1
t-1=1
t=2
2、-5(2/3x-1/2)=6(2/3-1/2)-5.5
原方程可化为
-5*(2/3)x+5*(1/2)=6*(2/3)-6*(1/2)-5.5
-5*(2/3)x=6*(2/3)-6*(1/2)-5*(1/2)-5.5
-5*(2/3)x=4-11*(1/2)-5.5
-5*(2/3)x=4-5.5-5.5
-5*(2/3)x=-7
(2/3)x=(-7)/(-5)
x=21/10=2.1
收起