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Sugar200311
@Sugar200311
January 2021
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Bonjour!!!
Pouvez vous m'aider pour cette exercice?!?
Merci!!!
1) 8-2x > -(2x+6)
2) 3+2(4-x)< 5x
3) -x+2> 13+2x
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loulakar
Verified answer
Bonjour,
1) 8-2x > -(2x+6)
8 - 2x > -2x - 6
8 - 2x + 2x > -2x - 6 + 2x
8 > -6
Quelque soit x c’est vrai
2) 3+2(4-x)< 5x
3 + 8 - 2x < 5x
11 - 2x + 2x < 5x + 2x
11 < 7x
11/7 < 7x/7
11/7 < x
x € ] 11/7 ; +∞ [
3) -x+2> 13+2x
- x + 2 + x > 13 + 2x + x
2 > 13 + 3x
2 - 13 > 13 + 3x - 13
-11 > 3x
-11/3 > 3x/3
-11/3 > x
x € ] -∞ ; -11/3 [
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Verified answer
Bonjour,1) 8-2x > -(2x+6)
8 - 2x > -2x - 6
8 - 2x + 2x > -2x - 6 + 2x
8 > -6
Quelque soit x c’est vrai
2) 3+2(4-x)< 5x
3 + 8 - 2x < 5x
11 - 2x + 2x < 5x + 2x
11 < 7x
11/7 < 7x/7
11/7 < x
x € ] 11/7 ; +∞ [
3) -x+2> 13+2x
- x + 2 + x > 13 + 2x + x
2 > 13 + 3x
2 - 13 > 13 + 3x - 13
-11 > 3x
-11/3 > 3x/3
-11/3 > x
x € ] -∞ ; -11/3 [