Odpowiedzi

2010-04-13T19:24:59+02:00
3x-12-8x +21 = 2x+10
3x - 8x - 2x + 10 + 12 - 21
-7x = 1
x = - 1/7

4x-6+12=3x = -x-1
4x-3x+x = -1+6-12
2x=-5
x = -2,5

2x-4-12+4 = -3x -6+4x-2
2x+4x+3x-4x = 4+12-2-6
3x=8
x = 8/3

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2010-04-13T19:25:49+02:00
1)3x-12-8x-28=2x+10
5x-40=2x+10 3x=30 x=10
2)4x-6+12-3x=-x-1
x+6=-x-1 0=5
3)2x-4-12-4x=-3x-6+4x-2
-2x-16=x-8 -x=-24 x=24
4)6x+6+6-3x=4x-2-4+x
3x+12=5x-6 -2x=6 -x=3 x=-3
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