3x+0.5x=4.2 4x-2.16=1.2 x-0.2x=16 2x-4x[这个x是乘】2.5=3.6 3x+5x=168 怎么解
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3x+0.5x=4.2 4x-2.16=1.2 x-0.2x=16 2x-4x[这个x是乘】2.5=3.6 3x+5x=168 怎么解
3x+0.5x=4.2 4x-2.16=1.2 x-0.2x=16 2x-4x[这个x是乘】2.5=3.6 3x+5x=168 怎么解
3x+0.5x=4.2 4x-2.16=1.2 x-0.2x=16 2x-4x[这个x是乘】2.5=3.6 3x+5x=168 怎么解
3x+0.5x=4.2
3.5x=4.2
x=4.2÷3.5
x=1.2
4x-2.16=1.2
4x=3.36
x=0.84
x-0.2x=16
0.8x=16
x=20
2x-4x乘以2.5=3.6
2x-10=3.6
2x=13.6
x=6.8
3x+5x=168
8x=168
x=21
这是什么题啊
3x+0.5x=4.2
3.5x=4.2
x=4.2/3.5
x=1.2
4x-2.16=1.2
4x=2.16-1.2
4x=0.96
x=0.24
x-0.2x=16
0.8x=16
x=16/0.8
x=20
2x-4x2.5=3.6
2x-10=3.6
2x=13.6
x=6.8
3x+5x=168
8x=168
x=168/8
x=21
3.2+x=4.6 x-2.08=5.76 1.2x=0.84 3x+0.5x=4.2 4x-2.16=1.2 x-0.2x=16 2x-4*2.5=3.6 x除以5.4=0.26
3x+0.5x=4.2 4x-2.16=1.2 x-0.2x=16 2x-4x[这个x是乘】2.5=3.6 3x+5x=168 怎么解
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