Question

rezolvati sistemele de ecuatiii
a)5x+2y=14
3x+5y=16
b) 4x-2y=-2
3x+6y=6
rapid dau coroana

Answer 1

a)5x+2y=14. /×(-5). -25x-10y=-70

3x+5y=16. /×2 =>. 6x+10y= 32

__________(+)

-19x= - 38

X= 2

X= 2

5x+2y= 14 => 10 + 2y = 14 => y = 2

b) 4x-2y=-2. /× 3 =>. 12x-6y = -6

3x+6y=6. 3x+6y= 6

___________(+)

15x=0 => X=0

X=0 => 4×0 -2y = -2 => y = 1

Coroana?