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dam270620
@dam270620
July 2022
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résoudre les équations suivantes:
a)4x +9=3x+15
b)7x -23=8x +34
c)3x +7=5x +25
d)4x -27=7x -12
e)8x -32=3x + 23
f)11x -24=1-14x
g)-5x -24=3x +17
h)4x -31=24 - 7x
i)6x - 23=13x + 19
j)21+3x =7x -34
svp c'est pour demain expliquer moi
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maitala
A) 4x+9=3x+15 (tu fais -3x de chaque côté, puis -9 des deux côtés, et tu finis par
=1x+9=15 diviser le résultat par le nombre qui est devant x)
=1x=6
x=6
b)7x-23=8x+34
=-1x-23=34
=-1x=57
x=-57
c)3x+7=5x+25
=-2x+7=25
=-2x=18
x=-9
d)4x-27=7x-12
=-3x-27=-12
=-3x=15
x=-5
e)8x-32=3x+23
=5x-32=23
=5x=55
x=11
f)11x-24=1-14x
=25x-24=1
=25x=25
x=1
g)-5x-24=3x+17
=-8x-24=17
=-8x=41
x=5,125
h)4x-31=24-7x
=11x-31=24
=11x=55
x=5
i)6x-23=13x+19
=-7x-23=19
=-7x=42
x=-6
j)21+3x=7x-34
=21-4x=-34
=-4x=-55
x=13,75
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dam270620
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=1x+9=15 diviser le résultat par le nombre qui est devant x)
=1x=6
x=6
b)7x-23=8x+34
=-1x-23=34
=-1x=57
x=-57
c)3x+7=5x+25
=-2x+7=25
=-2x=18
x=-9
d)4x-27=7x-12
=-3x-27=-12
=-3x=15
x=-5
e)8x-32=3x+23
=5x-32=23
=5x=55
x=11
f)11x-24=1-14x
=25x-24=1
=25x=25
x=1
g)-5x-24=3x+17
=-8x-24=17
=-8x=41
x=5,125
h)4x-31=24-7x
=11x-31=24
=11x=55
x=5
i)6x-23=13x+19
=-7x-23=19
=-7x=42
x=-6
j)21+3x=7x-34
=21-4x=-34
=-4x=-55
x=13,75