please dijelasin pake cara

3x+5y=-9 & 5x+7y=-19

memakai cara eliminasi jadi
5x+7y=-19. ×3
3x+5y=-9. ×5

15x+21y=-57
15x+25y=-45
---------------------_
-4y=-12
y=3. masukkan y ke persm 1

5x+7(3)=-19
5x+21=-19
5x=-40
x=-8

4x+3y=
4(-8)+3(3)=(-32)+9=(-23)

3x + 5y = -9 |x5| 15 x + 25y = -45
5x + 7y = -19|x3| 15x + 21y = - 57
_____________ -
4y = 12
y = 3
3x + 5y = -9
3x + 5(3) = -9
3x + 15 = -9
3x = -9 - 15
3x = -24
x = -8
untuk 4x + 3y = 4(-8) + 3(3) = -32 + 9 = -23