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  • Utilisateur Brainly
2014-10-01T15:52:35+02:00
8x = 20
x = 20 : 8
x = 2,5

3x - 15 = 0
3x - 15 + 15 = 15
3x = 15
x = 15 : 3
x = 5
X=20:8.....x=2.5......3x=15...x=15:3……x=5