je dois resoudre des equation et je ny arrive pas aidez moi svp 3(x-1)+2(x+3)=0 -5(x+2)+3(x-3)=7 4(-x+1)-2(3x-5)=0 7(2x-6)-4(5x-8)=-5x
Mathématiques
guillaume60180
Question
je dois resoudre des equation et je ny arrive pas aidez moi svp
3(x-1)+2(x+3)=0
-5(x+2)+3(x-3)=7
4(-x+1)-2(3x-5)=0
7(2x-6)-4(5x-8)=-5x
3(x-1)+2(x+3)=0
-5(x+2)+3(x-3)=7
4(-x+1)-2(3x-5)=0
7(2x-6)-4(5x-8)=-5x
1 Réponse
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1. Réponse nathalienouts
3(x-1)+2(x+3)=0
3x-3+2x+6 = 0
5x+3 = 0
5x = -3
x = -3/5
-5(x+2)+3(x-3)=7
-5x-10+3x-9 = 7
-2x-19 = 7
-2x = 7+19
-2x = 26
x = -26/2 = -13
4(-x+1)-2(3x-5)=0
-4x+4-6x+10 = 0
-10x + 14 = 0
-10x = -14
x = -14/-10
x = 7/5
7(2x-6)-4(5x-8)=-5x
14x-42-20x+32 = -5x
-6x-10 = -5x
-6x-10+5x = 0
-x-10 = 0
x = -10