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WonderFxck
@WonderFxck
January 2021
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Bonsoir, j'ai 2 exercices sur les équations mais je n'y comprends rien du tout pourriez-vous m'aider ? Merci d'avance.
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hugo12
Ex 29
a)développer A
A=2(3-4x)
A=6-8x
b) réduire B
B=10-3X x +2
B=10-3x+2
B=-3x+12
équation A=B
6-8x=-3x+12
-8x+3x=-6+12
-5x=+6
x=-6/5
ex 30
A) 3x=9(x-8)
3x=9x-72
3x-9x=-72
-6x=-72
x=72/6=12
B) 10x-3(2x-15)=7x
10x-6x+45=7x
10x-6x-7x=-45
10x-13x=-45
-3x=-45
x=45/3
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a)développer A
A=2(3-4x)
A=6-8x
b) réduire B
B=10-3X x +2
B=10-3x+2
B=-3x+12
équation A=B
6-8x=-3x+12
-8x+3x=-6+12
-5x=+6
x=-6/5
ex 30
A) 3x=9(x-8)
3x=9x-72
3x-9x=-72
-6x=-72
x=72/6=12
B) 10x-3(2x-15)=7x
10x-6x+45=7x
10x-6x-7x=-45
10x-13x=-45
-3x=-45
x=45/3