Question
Coucou j'ai un des equations en mathématique auquel je n'arrive a répondre est-ce-que vous pourriez m'aider? Je dois faire sa pour jeudi
a) 3 (2x + 5) = -7 (3-2x)
b) 4 (2- 8x) -3 (-9x + 1) = 0
a) 3 (2x + 5) = -7 (3-2x)
b) 4 (2- 8x) -3 (-9x + 1) = 0
Asked by: USER3995
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208 Answers
Answer (208)
a) 3 (2x + 5) = - 7 (3 - 2x)
3 * 2x + 3 * 5 = - 7 * 3 - 7 * (- 2x)
6x + 15 = - 21 + 14x
6x - 14x = - 21 - 15
- 8x = - 36
x = - 36 / (- 8)
x = 4,5
b) 4 (2 - 8x) - 3 (- 9x + 1) = 0
4 * 2 + 4 * (- 8x) - 3 * (- 9x) - 3 * 1 = 0
8 - 32x + 27x - 3 = 0
- 5x + 5 = 0
- 5x = - 5
x = - 5 / (- 5)
x = 1
3 * 2x + 3 * 5 = - 7 * 3 - 7 * (- 2x)
6x + 15 = - 21 + 14x
6x - 14x = - 21 - 15
- 8x = - 36
x = - 36 / (- 8)
x = 4,5
b) 4 (2 - 8x) - 3 (- 9x + 1) = 0
4 * 2 + 4 * (- 8x) - 3 * (- 9x) - 3 * 1 = 0
8 - 32x + 27x - 3 = 0
- 5x + 5 = 0
- 5x = - 5
x = - 5 / (- 5)
x = 1
a) 3 (2x + 5) = -7 (3-2x)
6x+15=-21+14x
6x-14x=-21-15
-8x=-36
x=-36/-8
x=36/8
x=9*4/4*2
x=9/2
b) 4 (2- 8x) -3 (-9x + 1) = 0
8-32x+27x-3=0
8-3-5x=0
5-5x=0
5x=5
x=5/5
x=1
6x+15=-21+14x
6x-14x=-21-15
-8x=-36
x=-36/-8
x=36/8
x=9*4/4*2
x=9/2
b) 4 (2- 8x) -3 (-9x + 1) = 0
8-32x+27x-3=0
8-3-5x=0
5-5x=0
5x=5
x=5/5
x=1