Website Statistics pouvais vous maider décomposser et calculer 112x513x 7x83x2 2x5119 5x212 33x2x3113 32 x 1 x41 4x2213x7x12 5512x135x123x75 6115x20 11532x 73x78x460x h4x132x2
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pouvais vous m'aider décomposser et calculer :

 

1)12+x=5-13x ; 7x-8=3x+2

2)x/5+11=-9 ;5-x/2=1/2

3)3x/2+x/3-1=1/3 ; 3/2 x +1 =x/4-1

4(x-2)+2(1-3x)=7x+12

5)5-12x+13.5=-x+12+3x-7.5

6)11/5x+2=0 ; 11=5+3/2x

7)3x+7(8-x)+4=60+x

h4(x-1)-3(2-x)=2

Répondre :

maudmarine
Bonjour,

1)12+x=5-13x 
x + 13x = 5 - 12
14x = - 7
x = - 7/14
x = - 1/2

7x-8=3x+27x - 3x = 2 + 84x = 10x = 10/4x = 5/2
2)x/5+11=-9x/5 = - 9 - 11x/5 = - 45/5 - 55/5x = - 45 - 55x = - 100
5-x/2=1/2- x = 1x = - 1
3)3x/2+x/3-1=1/3 3x/2 + x/3 = 1/3 + 19x/6 + 2x /6 = 2/6 + 6/69x + 2x = 2 + 611x = 8x = 8/11
3/2 x +1 =x/4-13/2x - x/4 = - 1 - 16/4x - x/4 = - 4/4 - 4/45x = - 8x = - 8/5
4(x-2)+2(1-3x)=7x+124x - 8 + 2 - 6x = 7x + 124x - 6x - 7x = 12 + 8 - 2- 9x = 18x = - 18/9x = - 2
5)5-12x+13.5=-x+12+3x-7.5- 12x + x - 3x = 12 - 7,5 - 5 - 13,5- 14x = 12 - 26- 14x = - 14x = 14/14x = 1
6)11/5x+2=0 11/5x = - 211/5x = - 10/511x = - 10x = - 10/11
11=5+3/2x3/2x = 11 - 53/2x = 22/2 - 10/23x = 22 - 103x = 12x = 12/3x = 4
7)3x+7(8-x)+4=60+x3x + 56 - 7x + 4 = 60 + x3x - 7x - x = 60 - 56 - 4- 5x = 60 - 60- 5x = 0x = 0
h4(x-1)-3(2-x)=24x - 4 - 6 + 3x = 24x + 3x = 2 + 4 + 67x = 12x = 12/7

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