Answer:
[tex]x=-7[/tex]
[tex]y=-2[/tex]
Step-by-step explanation:
Given system of equations,
-3x + 6y = 9 ------(1)
5x + 7y = -49 ------(2),
LCM (3, 5) = 15,
5 × equation (1) + 3 × equation (2),
We get,
30y + 21y = 45 - 147
51y = -102
[tex]\implies y=-2[/tex]
From equation (1),
[tex]-3x+6(-2)=9[/tex]
[tex]-3x-12=9[/tex]
[tex]-3x=9+12[/tex]
[tex]-3x=21[/tex]
[tex]x=-7[/tex]
