6乘以4-0.5x=12.8 (24.5-x)乘以2-13=20 5x-x+1.8=3.6 (x+2.1)除以3=10.5 3.5乘以x=105 13.06-x=8.07 0.2(x-3.5)=1 12x-3.5x+85 1.2x-x=35 3-3x=0.3 3.5乘以6-0.2x=11.4 3.5乘以(6-0.2x)=17.5

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6乘以4-0.5x=12.8(24.5-x)乘以2-13=205x-x+1.8=3.6(x+2.1)除以3=10.53.5乘以x=10513.06-x=8.070.2(x-3.5)=112x-3.5x

6乘以4-0.5x=12.8 (24.5-x)乘以2-13=20 5x-x+1.8=3.6 (x+2.1)除以3=10.5 3.5乘以x=105 13.06-x=8.07 0.2(x-3.5)=1 12x-3.5x+85 1.2x-x=35 3-3x=0.3 3.5乘以6-0.2x=11.4 3.5乘以(6-0.2x)=17.5
   6乘以4-0.5x=12.8
  (24.5-x)乘以2-13=20
   5x-x+1.8=3.6
   (x+2.1)除以3=10.5
   3.5乘以x=105
     13.06-x=8.07
     0.2(x-3.5)=1
    12x-3.5x+85
     1.2x-x=35
    3-3x=0.3
    3.5乘以6-0.2x=11.4
   3.5乘以(6-0.2x)=17.5

6乘以4-0.5x=12.8 (24.5-x)乘以2-13=20 5x-x+1.8=3.6 (x+2.1)除以3=10.5 3.5乘以x=105 13.06-x=8.07 0.2(x-3.5)=1 12x-3.5x+85 1.2x-x=35 3-3x=0.3 3.5乘以6-0.2x=11.4 3.5乘以(6-0.2x)=17.5
6×4-0.5X=12.8
24-0.5X=12.8
0.5X=24-12.8
X=22.4
(24.5-X)×2-13=20
49-2X-13=20
2X=36-20
X=8
5X-X+1.8=3.6
4X=3.6-1.8
X=1.8÷4
X=0.45
(X+2.1)÷3=10.5
(X+2.1)÷3×3=10.5×3
X+2.1=31.5
X=31.5-2.1
X=29.4
3.5×X=105
X=105÷3.5
X=30
13.06-X=8.07
X=13.06-8.07
X=4.99
0.2(X-3.5)=1
0.2X-0.7=1
0.2X=1+0.7
X=8.5
12X-3.5X+85
这题不是方程
1.2X-X=35
0.2X=35
X=35÷0.2
X=175
3-3X=0.3
3X=3-0.3
3X=2.7
X=2.7÷3
X=0.9
3.5×6-0.2X=11.4
21-0.2X=11.4
0.2X=21-11.4
0.2X=9.6
X=48
3.5×(6-0.2X)=17.5
21-0.2X=17.5
0.2X=21-17.5
0.2X=3.5
X=3.5÷0.2
X=17.5