解方程:(1) 0.5x-0.7=6.5-1.3x (2) -1/3 (1-2x) = 2/7 (3x+1)
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解方程:(1) 0.5x-0.7=6.5-1.3x (2) -1/3 (1-2x) = 2/7 (3x+1)
0.5x-0.7=6.5-1.3x
5x -7=65-13x
5x+13x =65+7
18x =72
x=4
-1/3 (1-2x) = 2/7 (3x+1)
-7 (1-2x) =6 (3x+1)
-7+14 x =18x+6
14x-18x=6+7
- 4x=13
x= -13/4
再问: 求大神回答我最后一个问题~~~ 解方程:x-1/3 - x+2/6 = 4-x/2+1
再答: x-1/3 - x+2/6 = 4-x/2+1 x-1/3 - x+2/6 = 4-x/3 2x-2-x-2 =4-x x-4 =4-x 2x =8 x =4
5x -7=65-13x
5x+13x =65+7
18x =72
x=4
-1/3 (1-2x) = 2/7 (3x+1)
-7 (1-2x) =6 (3x+1)
-7+14 x =18x+6
14x-18x=6+7
- 4x=13
x= -13/4
再问: 求大神回答我最后一个问题~~~ 解方程:x-1/3 - x+2/6 = 4-x/2+1
再答: x-1/3 - x+2/6 = 4-x/2+1 x-1/3 - x+2/6 = 4-x/3 2x-2-x-2 =4-x x-4 =4-x 2x =8 x =4
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