三、解方程.( 要用竖式啊)1.2X-2.8*2.5=8.962.4x+12*3=1003.3x+34.6+13.4=111.3
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三、解方程.( 要用竖式啊)1.2X-2.8*2.5=8.962.4x+12*3=1003.3x+34.6+13.4=111.3
三、解方程.( 要用竖式啊)
1.2X-2.8*2.5=8.96
2.4x+12*3=100
3.3x+34.6+13.4=111.3
三、解方程.( 要用竖式啊)1.2X-2.8*2.5=8.962.4x+12*3=1003.3x+34.6+13.4=111.3
1.2X-2.8*2.5=8.96
2x=8.96+7
x=15.96/2
x=7.98
2.4x+12*3=100
4x=100-36
x=64/4
x=16
3.3x+34.6+13.4=111.3
3x=111.3-48
x=63.3/3
x=21.1
5X+3(9-x)=37 5x+27-3x=37 5x-3x=37-27 2x=10 x=5 42x+35(6-x)=231 42x+35*6-35x=231 42x-35x=231-35*6 7x=231-210 7x=21
1.2X-2.8*2.5=8.96
x=7.98
2.4x+12*3=100
x=16
3.3x+34.6+13.4=111.3
x=21.1