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Daca x=7si a+b=11,aflati: a)3x+2a+2b b)x+13a+13b c)ax+xb

Răspuns :

x=7 si a+b=11

a)
3x+2a+2b =
3×7+2×(a+b)=
21+2×11=
21+22=
43


b)
x+13a+13b =
7+13×(a+b)=
7+13×11=
7+143=
150

c)
ax+xb=
X × (a+b)=
7×11=
77