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Sagot :
bonsoir
a) 5 x - 3 x = 3
2 x = 3
x = 3/2
b) 8 x - 12 x = 4
- 4 x = 4
x = - 1
c) - 7 x - 10 x = - 4
- 17 x = - 4
x = 4/17
d) 7 x + x = - 4 - 1
8 x = - 5
x = - 5/8
e) 3 x + 3 x = 7 - 2
6 x = 5
x = 5/6
f) 6 x + x = - 9 - 5
7 x = - 14
x = - 2
g) 11 x - 8 x = 7 - 3
3 x = 4
x = 4/3
h) 5.5 x - 9 x = 6 - 1.5
- 3.5 x = 4.5
x = - 45/35 = - 9/7
i) - 3.3 x - 2 x = - 9.7 - 7
- 5.3 x = - 16.7
x = 16.7/5.3 = 167/53
j) - x + 8 x = 1.7 - 5.1
7 x = - 3.4
x = - 3.4/7 = - 34/70 = - 17/35
a) 5 x - 3 x = 3
2 x = 3
x = 3/2
b) 8 x - 12 x = 4
- 4 x = 4
x = - 1
c) - 7 x - 10 x = - 4
- 17 x = - 4
x = 4/17
d) 7 x + x = - 4 - 1
8 x = - 5
x = - 5/8
e) 3 x + 3 x = 7 - 2
6 x = 5
x = 5/6
f) 6 x + x = - 9 - 5
7 x = - 14
x = - 2
g) 11 x - 8 x = 7 - 3
3 x = 4
x = 4/3
h) 5.5 x - 9 x = 6 - 1.5
- 3.5 x = 4.5
x = - 45/35 = - 9/7
i) - 3.3 x - 2 x = - 9.7 - 7
- 5.3 x = - 16.7
x = 16.7/5.3 = 167/53
j) - x + 8 x = 1.7 - 5.1
7 x = - 3.4
x = - 3.4/7 = - 34/70 = - 17/35
!bonsoir voilà la réponse
a. 5x=3x +3
5x-3x = 3
2x = 3
x = 3/2 = 1.5
b. 8x=12x +4
8x-12x = 4
-4x = 4
x = 4/-4 = -1
c.4 - 7x= 10x
4 = 10x+7x
4 = 17x
17x = 4
x = 4/17
d.7x + 1 = -4 -x
7x+x = -4-1
8x = -5
x = -5/8
e. 2+ 3x = 7 - 3x
3x+3x = 7-2
6x = 5
x = 5/6
f. 5+ 6x = -x - 9
6x+x = -9-5
7x = -14
x = -14/7 = -2
g. 11x + 3 =8x + 7
11x-8x = 7-3
3x = 4
x = 4/3
h. 5,5x + 1,5 = 9x + 6
5.5x-9x = 6-1.5
-3.5x = 4.5
x = 4.5/-3.5 = -4.5/3.5
i. 7- 3,3x = 2x - 9,7
-3.3x-2x = -9.7-7
-5.3x = -16.7
x = -16.7/-5.3 = 16.7/5.3 = 11.4
j. 5,1 - x = -8x + 1,7
-x+8x = 1.7-5.1
7x = -3.4
x = -3.4/7
voilà j'espère avoir pu t'aider ^^
a. 5x=3x +3
5x-3x = 3
2x = 3
x = 3/2 = 1.5
b. 8x=12x +4
8x-12x = 4
-4x = 4
x = 4/-4 = -1
c.4 - 7x= 10x
4 = 10x+7x
4 = 17x
17x = 4
x = 4/17
d.7x + 1 = -4 -x
7x+x = -4-1
8x = -5
x = -5/8
e. 2+ 3x = 7 - 3x
3x+3x = 7-2
6x = 5
x = 5/6
f. 5+ 6x = -x - 9
6x+x = -9-5
7x = -14
x = -14/7 = -2
g. 11x + 3 =8x + 7
11x-8x = 7-3
3x = 4
x = 4/3
h. 5,5x + 1,5 = 9x + 6
5.5x-9x = 6-1.5
-3.5x = 4.5
x = 4.5/-3.5 = -4.5/3.5
i. 7- 3,3x = 2x - 9,7
-3.3x-2x = -9.7-7
-5.3x = -16.7
x = -16.7/-5.3 = 16.7/5.3 = 11.4
j. 5,1 - x = -8x + 1,7
-x+8x = 1.7-5.1
7x = -3.4
x = -3.4/7
voilà j'espère avoir pu t'aider ^^
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