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Serafina
a fost răspuns

Calculati :
a)-7-(x+14)-(273-9+381)-(-645-x-20)=?
b)17+(x-4)-(-7+5+x)+(-2+14)-(-4+30)=?

Răspuns :

Renatemambouko
a)-7-(x+14)-(273-9+381)-(-645-x-20)=
=-7-x-14-645+665+x=
=-7-14-645+665=
=-1



 b)17+(x-4)-(-7+5+x)+(-2+14)-(-4+30)=
=17+x-4+7-5-x-2+14+4-30=
=17-4+2-2+18-30=
=13-12=1





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