Question

3x+y=-5
7x+3y=1
X dan y?
Tolongg caranya ya kakkk terimakasihh

Answer 1

|Penyelesaian :

3x + y = 5 |×7

7x + 3y = 1 |×3

_ _ _

21x + 7y = 35

21x + 9y = 3

___________ -

-2y = 32

y = 32/-2

y = -16

3x + y = 5

3x + -16 = 5

3x = 5 + 16

3x = 21

x = 21/3

x = 7

Hp = ( x, y ) = ( 7, -16 )