aider moi a resoudre lesequation suivants : 9x=3(x-8) 3(2t+5)=4(5t+7) 2(3x+4)-5(1-2x)=7(2x-3)+12 (4x+3)(8-3x)=-2x(6x-2)
Mathématiques
Naaavy
Question
aider moi a resoudre lesequation suivants :
9x=3(x-8)
3(2t+5)=4(5t+7)
2(3x+4)-5(1-2x)=7(2x-3)+12
(4x+3)(8-3x)=-2x(6x-2)
9x=3(x-8)
3(2t+5)=4(5t+7)
2(3x+4)-5(1-2x)=7(2x-3)+12
(4x+3)(8-3x)=-2x(6x-2)
1 Réponse
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1. Réponse nonotata
9x=3(x-8)
9x = 3x-24
9x-3x = -24
6x = -24
x = -24/6 =-4
3(2t+5)=4(5t+7)
6t+15 = 20t +28
6t -20t = 28-15
-14t = 13
t = -13/14
2(3x+4)-5(1-2x)=7(2x-3)+12
6x+8-5+10x = 14x-21+12
16x+3 = 14x-9
16x-14x = -9-3
2x = -12
x = -12/2
x = -6
(4x+3)(8-3x)=-2x(6x-2)
32x-12x² +24-9x = -12x²+4x
23x-12x² +12x² -4x = -24
19x = -24
x = -24/19