maths(quickly,right

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maths(quickly,right
4*35%+3(21-x)=(15-2x)*20%-1
1/3[x-1/2(x-1)]=2/3(x-1/2)
已知关于x的方程(2x-a)/3-(x-a)/2=x-1与方程3（x-2)=4x-5同解,求a的值

4*35%+3(21-x)=(15-2x)*20%-1
1.4+63-3x=3-0.4x-1
3x-0.4x=64.4-2
2.6x=62.4
x=24
1/3[x-1/2(x-1)]=2/3(x-1/2)
两边乘3
x-1/2(x-1)=2x-1
x-x/2+1/2=2x-1
2x-x/2=1/2+1
3x/2=3/2
x=1
3（x-2)=4x-5
3x-6=4x-5
x=-1
代入(2x-a)/3-(x-a)/2=x-1
(-2-a)/3-(-1-a)/2=-1-1
两边乘6
-4-2a+3+3a=-12
a-1=-12
a=-11

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