小升初数学专题之解方程
1∕3(2X+3)—1∕6(5X-1)3∕2[2(X-1∕2)+2∕3]=2X7(2X-1)-3(4X-1)=5(3X+2)-13(x-7)-2[9-4(2-X)]=22...
1∕3(2X+3)—1∕6(5X-1)
3∕2[2(X-1∕2)+2∕3]=2X
7(2X-1)-3(4X-1)=5(3X+2)-1
3(x-7)-2[9-4(2-X)]=22 展开
3∕2[2(X-1∕2)+2∕3]=2X
7(2X-1)-3(4X-1)=5(3X+2)-1
3(x-7)-2[9-4(2-X)]=22 展开
2个回答
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1/3(2X+3) =1/6(5X-1)
2(2X+3) =(5X-1)
4X+6 =5X-1
X = 7
3/2[2(X-1/2)+2/3]=2X
3[2(X-1/2)+2/3]=4X
6(X-1/2)+2=4X
6X-1=4X
X=1/2
7(2X-1)-3(4X-1)=5(3X+2)-1
14X-7-12X+3=15X+10-1
13X = -13
X = -1
3(x-7)-2[9-4(2-X)]=22
3x-21- 18+16-8X=22
5x = 55
x = 11
2(2X+3) =(5X-1)
4X+6 =5X-1
X = 7
3/2[2(X-1/2)+2/3]=2X
3[2(X-1/2)+2/3]=4X
6(X-1/2)+2=4X
6X-1=4X
X=1/2
7(2X-1)-3(4X-1)=5(3X+2)-1
14X-7-12X+3=15X+10-1
13X = -13
X = -1
3(x-7)-2[9-4(2-X)]=22
3x-21- 18+16-8X=22
5x = 55
x = 11
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