Question

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

Answer 1

$a) 7x+7y+7z= 7(x+y+z)= 7(3+10)=7$ · $13=91$


$17x+17y+17z-10=17(x+y+z)-10=17(3+10)-10=17$·$13-10=221-10=212$

$c) 7a+7b+49= 7(a+b)+49$

d) 3•x-3•y+3=$d) 3x-3y+3=3(x-y)+3=-3(x+y)+3=$