Réponse:
a)4+4+x=8x
b)x+x+x+x=4x
c)8x+4x=12x
d)8 × 5=40
4×5=20
12×5=60
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Réponse:
a)4+4+x=8x
b)x+x+x+x=4x
c)8x+4x=12x
d)8 × 5=40
4×5=20
12×5=60