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2、解方程
72513
+ X = 1 X— = X+ = 979 X - 29 = 1
6
2X + 7X = 4.5 3X - 2 = 4
X - (115
3 + 4) = 12
3X+ 4X= 5.67
138319 82 33710+x=5 x-15=15 x―110―25=25 3x-167=57 2x
x+13=2
5 x-31124=12
7 +x=3
9571214 419-x=18
+16=116
13
12x-9x=8.7 9x-4x=6.5 x- =
68
337141+x= x-= -x= 105 x―110―225=5 3x
5X-2X=18
x — 516 = 9
2x + 1 = 5
3 x -x = 0.9
x — 56 = 19
2x + 1 = 5 13a-5a=3
155918-1617=57 2x+6=116
35+X=710 X-31
4=12
15
2 + x = 6 12x — 9x = 8.7 3x — x = 0.9 x — 31
4 = 12 x -415 = 45 524 + x = 11
12
12x — 9x = 8.7 3x — x = 0.9 x + 23
9 = 5 3x+ 4x= 5.67
12 + x = 56
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