a)
{3(x+4) + y = 3 =
x+4= 3+3
= 6
y+x= 4×6
= 24
b)
x+2(y+5)=2
x+ y= 2+2 =
= 4
x+y = 4+5=
= 9
bafta
3×(x+4)+y=3
x+2×(y+5)=2
3x+12+y =3
x+2y+10=2
3x+y=-9
x+2y= -8
x= -8-2y
3×(-8-2y)+y= -9
-24-6y+y= -9
-5y= -9+24
-5y=15
( y= -3 )
x= -8-2×( -3 )
x= -8+6
( x= -2 )
Sper că te va ajuta acest răspuns :)
