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  • Utilisateur Brainly
2014-10-27T12:00:07+01:00
3x + 7 = - 2x - 8
3x + 2x = - 8 - 7
5x = - 15
x = - 15/5
x = - 3

3(2x - 4) = 9 - 4(3x - 5)
6x - 12 = 9 - 12x + 20
6x + 12x = 9 + 20 + 12
18x = 41
x = 41/18
2014-10-27T12:02:30+01:00
3x+7= -2x -8
3x +2x = -8 -7
5x= -15
x = -15/5
x= -3

3(2x-4) = 9 -4 (3x-5)
6x -12 = 9 -12x +20
6x +12x = 9 +20 +12
18x = 41
x = 41/18