Resoudre 2 x+3= x+5 ; 3x -5=2x+9; x+3=2x-5; -8x-3=4x+9; 2x+2=9-5x ; 3-2x=-5 merci pour l'aide....j'ai fais mes équations mais pas sur du tout
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2x +3= x + 52x +3 -3 -x= x +5 -3 -x
x= 2
3x -5= 2x +9
3x -5 +5 -2x= 2x +9 +5 -2x
x= 14
x +3= 2x -5
x +3 -3 -2x= 2x -5 -3 -2x
-x= -8
x= 8
-8x -3= 4x +9
-8x -3 +3 -4x= 4x +9 +3 -4x
-12x= 12
-12x/-12= 12/12
x= 1
2x +2= 9 -5x
2x +2 -2 +5x= 9 -5x +5x -2
7x= 7
7x/7= 7/7
x= 1
3 -2x= -5
-2x +3 -3= -5 +3
-2x= -2
-2x/-2= -2/-2
x= 1