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)
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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)
解方程:(1) 0.5x-0.7=6.5-1.3x (2) -1/3 (1-2x) = 2/7 (3x+1)

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

移项0.5x+1.3x=6.5+0.7
合并同类项1.8x=7.2
x=4
-三分之一+三分之二x=七分之六x+七分之二
x=-四分之十三

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
x-1/3-x+2/6=4-x/2+1
x/3-1/3-x/6-2/6=4/3-x/3
x/3+x/3-x/6=4/3+1/3+2/6
4x/6-x/6=5/3+1/3
x/2=2
x=4