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Daca x=3 si y+z=10, calculeaza:

a) 7ori x +7ori y+ 7ori z
b) 17 ori x +17ori y+17ori z - 10
va roggg


Răspuns :

x=3
y+z=10

a)
7x+7y+7z=7(3+10)=7×13=91

b)
17x+17y+17z-10=17(3+10)-10=17×13-10=221-10=211
a ) =7 ( x + y + z) = 7 x ( 3 + 10) = 7 x 13 = 91 

b) = 17 ( x + y + z) - 10 = 17 x 13 - 10 = 221 - 10 = 211