急 好的家50分!题:3(x+2.1)=10.5 12x-9x=8.75x+7=423.6x-x=3.25x/4.2=22(x-3)=5.8 (把解得过程也写出来!)

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急 好的家50分!题:3(x+2.1)=10.5 12x-9x=8.75x+7=423.6x-x=3.25x/4.2=22(x-3)=5.8 (把解得过程也写出来!)
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急 好的家50分!题:3(x+2.1)=10.5 12x-9x=8.75x+7=423.6x-x=3.25x/4.2=22(x-3)=5.8 (把解得过程也写出来!)
急 好的家50分!
题:
3(x+2.1)=10.5
12x-9x=8.7
5x+7=42
3.6x-x=3.25
x/4.2=2
2(x-3)=5.8
(把解得过程也写出来!)

急 好的家50分!题:3(x+2.1)=10.5 12x-9x=8.75x+7=423.6x-x=3.25x/4.2=22(x-3)=5.8 (把解得过程也写出来!)
3(X+2.1)=10.5
3X+6.3=10.5
3X=10.5-6.3
3X=4.2
X=1.4
12x-9x=8.7
3X=8.7
X=2.9
5x+7=42
5X=42-7
5X=35
X=7
3.6x-x=3.25
2.6X=3.25
X=1.25
x/4.2=2
X=2x4.2
X=8.4
2(x-3)=5.8
2X-6=5.8
2X=5.8+6
2X=11.8
X=5.9

3(x+2.1)=10.5
3x=10.5-6.3
x=41/30
12x-9x=8.7
3x=8.7
x=2.9
5x+7=42
5x=35
x=7
3.6x-x=3.25
2.6x=3.25
x=1.25
x/4.2=2
x=4.2*2
x=8.4
2(x-3)=5.8
2x-6=5.8
2x=11.8
x=5.9

真快

3X+6.3=10.5
3X=10.5-6.3
3X=4.2
X=4.2/3
X=1.4
3X=8.7
X=8.7/3
X=2.9
5X=35
X=5
2.6X=3.25
X=1.25

X=4.2*2
X=8.4
2X-6=5.8
2X=13.8
X=13.8/2
X=6.9
要 给 我 加 分啊

3(x+2.1)=10.5 3x+6.3=10.5 3x=4.2 x=1.4
12x-9x=8.7 3x=8.7 x=2.9
5x+7=42 5x=35 x=7
3.6x-x=3.25 2.6x=3.25 x=1.25
x/4.2=2 x=2*4.2=8.4
2(x-3)=5.8 x-3=11.6 x=14.6

3(x+2.1)=10.5 (x+2.1)=10.5/3 x+2.1=3.5 x=3.5-2.1 x=1.4
12x-9x=8.7 x(12-9)=8.7 3x=8.7 x=2.9
5x+7=42 5x=35 x=7
3.6x-x=3.25 2.6x=3.25 x=1.25
x/4.2=2 x=8.4
2(x-3)=5.8 x-3=2.9 x=5.9
晕了...

rfe

1,3x+6.3=10.5 3x=10.5-6.3 3x=4.2 x=1.4
2,3x=8.7 x=8.7/3 x=2.9
3,5x+7=42 5x=42-7 5x=35 x=35/5 x=7
4, 3.6x-x=3.25 2.6x=3.25 x=3.25/2.6 x=1.25
5,x/4.2=2 x=8.4
6, 2x-6=5.8 2x=5.8+6 2x=11.8 x=5.9

3(x+2.1)=10.5
3(x+2.1)÷3=10.5÷3
x+2.1=3.5
x+2.1-2.1=3.5-2.1
x= 1.4

12x-9x=8.7
3x=8.7
3x÷3=8.7÷3
x=2.9
5x+7=42
5x...

全部展开

3(x+2.1)=10.5
3(x+2.1)÷3=10.5÷3
x+2.1=3.5
x+2.1-2.1=3.5-2.1
x= 1.4

12x-9x=8.7
3x=8.7
3x÷3=8.7÷3
x=2.9
5x+7=42
5x+7-7=42-7
5x=35
5x÷5=35÷5
x=7
3.6x-x=3.25
(3.6-1)x=3.25
2.6x=3.25
2.6x÷2.6=3.25÷2.6
x=1.25
x/4.2=2
x/4.2×4.2=2×4.2
x=8.4
2(x-3)=5.8
2(x-3)÷2=5.8 ÷2
x-3=2.9
x-3+3=2.9+3
x=5.9

收起

(1)3(x+2.1)=10.5
3x+6.3=10.5
3x=10.5-6.3
3x=4.2
x=1.4
(2)12x-9x=8.7
3x=8.7
x=2.9
(3)5x+7=42
5x=42-7
5x=35
x=7
(4)3.6x-x=3.25<...

全部展开

(1)3(x+2.1)=10.5
3x+6.3=10.5
3x=10.5-6.3
3x=4.2
x=1.4
(2)12x-9x=8.7
3x=8.7
x=2.9
(3)5x+7=42
5x=42-7
5x=35
x=7
(4)3.6x-x=3.25
2.6x=3.25
x=1.25
(5)x/4.2=2
x÷4.2=2
x=2×8.4
x=16.8
(6)2(x-3)=5.8
2x-6=5.8
2x=5.8+6
2x=11.8
x=5.9

收起

5分死活说成50分???我靠

ol