Réponse :
Explications étape par étape
Bonsoir
Résoudre :
3x + 4 = 5x - 2
3x + 4 - 3x = 5x - 2 - 3x
4 + 2 = 2x - 2 + 2
6 = 2x
2x/2 = 6/2
x = 3
-3x + 4 = 3x - 7
-3x + 4 + 3x = 3x - 7 + 3x
4 = 6x - 7
4 + 7 = 6x - 7 + 7
11 = 6x
6x/6 = 11/6
x = 11/6
-12x + 5 = 4x + 17
-12x + 5 + 12x = 4x + 17 + 12x
5 - 17 = 16x + 17 - 17
-12 = 16x
16x/16 = -12/16
x = -3/4
x + 5 = -4x - 12
x + 5 + 4x = -4x - 12 + 4x
5x + 5 - 5 = -12
5x = -12
5x/5 = -12/5
x = -12/5
2x + 8 = -4x + 3
2x + 8 + 4x = -4x + 3 + 4x
6x + 8 - 8 = 3 - 8
6x = -5
6x/6 = -5/6
x = -5/6
5x - 9 = -5x + 17
5x - 9 + 5x = -5x + 17 + 5x
10x - 9 = 17
10x - 9 + 9 = 17 + 9
10x = 26
10x/10 = 26/10
x = 2,6
2/3 x + 5/4 = 7/3 x - 1/4
5/4 + 1/4 = 7/3 x - 2/3 x
6/4 = 5/3 x
3/2 = 5/3 x
x = 3/2 * 3/5
x = 9/10
3/4 x - 5/4 = -7/6 x + 1/6
3/4 x + 7/6 x = 1/6 + 5/4
9/12 x + 14/12 x = 2/12 + 15/12
23/12 x = 17/12
x = 17/12 * 12/23
x = 17/23
7/3 x + 9/5 = 3/5 x + 4/3
7/3 x - 3/5 x = 4/3 + 9/5
35/15 x - 9/15 x = 20/15 + 27/15
26/15 x = 47/15
x = 47/15 * 15/26
x = 47/26
2(3x + 5) - (5x^2 + 2) = x(-5x + 3) + 3(7x + 3)
6x + 10 - 5x^2 - 2 = -5x^2 + 3x + 21x + 9
5x^2 - 5x^2 + 8 - 9 = 24x - 6x
-1 = 18x
x = -1/18
