Question

25 points help pls, quickly too

Answer 1

-7x-6y=4

x=-3y+8

-7(-3y+8)-6y=4

x=-3y+8

21y-56-6y=4

x=-3y+8

15y-56=4

x=-3y+8

15y=4+56

x=-3y+8

15y=60 //15

x=-3y+8

y=4

x=-3*4+8

y=4

x=-12+8

y=4

x=-4

x=-4

y=4

Answer 2

Answer:

$x = - 4 \\ y = 4$

Step-by-step explanation:

$- 7x - 6y = 4 \: \: \: \: \: \: ...(1) \\ x = - 3y + 8 \: \: \: \: \: \: \: \: ...(2)$

Put x = -3y + 8 in equation (1)

$- 7( - 3y + 8) - 6y = 4 \\ 21y - 56 - 6y = 4 \\ 15y = 4 + 56 \\ 15y = 60 \\ \\ y = \frac{60}{15} \\ \\ y = 4$

put y = 4 in equation (2)

$x = - 3(4) + 8 \\ x = - 12 + 8 \\ x = - 4$