soit G=3(4x-2) calcule G lorsque : x=5 4x-2=7 12x=11 6x=5 2x-1=3 3x=25
Mathématiques
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Question
soit G=3(4x-2) calcule G lorsque :
x=5
4x-2=7
12x=11
6x=5
2x-1=3
3x=25
x=5
4x-2=7
12x=11
6x=5
2x-1=3
3x=25
2 Réponse
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1. Réponse Anonyme
Bonsoir,
G peut s'écrire de plusieurs manières.
G = 3(4x - 2)
= 12x - 6
= 2*6x - 6
= 4*3x - 6
= 3*2(2x - 1) = 6(2x - 1)
Si x = 5, alors G = 3(4x - 2) = 3(4*5 - 2)
= 3(20 - 2)
= 3*18
= 54.
Si 4x - 2 = 7, alors G = 3(4x - 2) = 3*7
= 21
Si 12x = 11, alors G = 12x - 6 = 11 - 6
= 5
Si 6x = 5, alors G = 2*6x - 6 = 2*5 - 6
= 10 - 6
= 4
Si 2x - 1 = 3, alors G = 6(2x - 1) = 6*3
= 18
Si 3x = 25, alors G = 4*3x - 6 = 4*25 - 6
= 100 - 6
= 94
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2. Réponse bau
x = 5 G = 3 x 18 G = 54
4 x – 2 = 7 G = 3 x 7 G = 21
12 x = 11 G = 11 – 6 G = 5
6 x = 5 G = 10 – 6 G = 4
2 x – 1 = 3 G = 6 x 3 G = 18
3 x = 25 G = 100 – 6 G = 94