Question

b) x = 0, y =8.
c)x=-2,y=12
d)x=-3,y=5
e)x=7,y=-9
f)x=-2,y=12
Ajutati-ma si pe mine va rog​

Answer 1

Răspuns:

Deci :-3x+5y

a)x=2

y=6

Inlocuim:

-3•2+5•6=-6+30=24

b)x=0

y=8

-3•0+5•8=-0+40=40

c)x=5

y=1

-3•5+5•1=-15+5=-10

d)x=-3

y=-5

-3•(-3)+5•(-5)=+9-25=16

e)x=7

y=-9

-3•7+5•(-9)=-21-45=-66

f)x=-2

y=12

-3•(-2)+5•12=+6+60=66