3(18-x)-4=7(x+1) svppp
Mathématiques
lol105
Question
3(18-x)-4=7(x+1) svppp
1 Réponse
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1. Réponse Elise0402
3 × 18 - 3 × x - 4 = 7 × x + 7 × 1
54 - 3x - 4 = 7x + 7
50 - 3x = 7x + 7
-3x - 7x = -50 + 7
-10x = -43
x = 43/10