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ajutatima va rog pune 3 daca nu fac

Ajutatima Va Rog Pune 3 Daca Nu Fac class=

Răspuns :

15.a)2x+2=-7x-21+9x-15-5
2x+7x-9x=-21-20-2
Ecuatia,nu,are,solutii...
b)9x-3+14=21x-9-10
9x+11=21x-19
-12x=-30
x=30/12=15/6
c)14+2(3-2x+6):2=37
14+9-2x=37
-2x=24
x=-12