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a+b+c=7.calculati:

a. 2a+2b+2c

b. 10a+10b+10c

c. a*13+b*13+c*13+21.

Răspuns :

Mihaelap
A) 2(A + B+ C) = 2 * 7 = 14
B) 10(A + B+ C) = 10 * 7 = 70
C)13(A + B + C) + 21 = 13 * 7 + 21 = 91 + 21 = 112
Cppajd
a) 2a+2b+2c
2(a+b+c)=2*7=14

b) 10a+10b+10c
10(a+b+c)=10*7=70

c) a*13+b*13+c*13+21=
13(a+b+c)+21=
13*7+21=
91+21=112

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