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Sagot :

Réponse :

bonjour!

Explications étape par étape :

A:3x5-4-(-3x(-2)-7)

=15 - 4 -( 6-7)

=11-(-1)

=11+1

=12

B:(5-4x2)-(3x8-7)

=(5-8) - (24 -7)

=-3 - 17

=-20

A: 3x5-4-(-3x(-2)-7)
= 15-4-(6-7)
=11-6+7
=5+7
=12


B:(5-4x2)-(3x8-7)
=(5-8)-(24-7)
=(-3)-(17)
=-3-17
=-20

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