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Mario1381
a fost răspuns

daca x=3 si y+z=10 , calculează:
a) 7•x+7•y+7•z=
b) 17•x+17•y+17•z-10=
c) 7•a+7•b+49=
d) 3•x-3•y+3=
helpppppp

Răspuns :

EllaOwnch
[tex]a) 7x+7y+7z= 7(x+y+z)= 7(3+10)=7[/tex] · [tex]13=91[/tex]


[tex]17x+17y+17z-10=17(x+y+z)-10=17(3+10)-10=17[/tex]·[tex]13-10=221-10=212[/tex]

[tex]c) 7a+7b+49= 7(a+b)+49[/tex]

d) 3•x-3•y+3=[tex]d) 3x-3y+3=3(x-y)+3=-3(x+y)+3=[/tex]

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