Réponse:
à = 2×2a+2×7+3b+2×b+2×8-2b+à
=2a+14+3b+2b+16-2b+à
=2a+à +14+16+3b+2b-2b
=3a+30+3b
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Réponse:
à = 2×2a+2×7+3b+2×b+2×8-2b+à
=2a+14+3b+2b+16-2b+à
=2a+à +14+16+3b+2b-2b
=3a+30+3b