Solving systems of equations using substitution with both equations in y=mx+b PLEASE HELP ME I WILL GIVE BRAINLIEST. I WILL HAVE TO DO APE. X IF I DONT GET THESE RIGHT. THANKYOU!

1.

y = x + 11 y = 1 + 11

y = 12x y = 12

x + 11 = 12x

11 = 11x

x = 1

(1, 12)

2.

y = 2x - 1

y = x + 1

2x - 1 = x + 1

x = 2

y = 2(2) - 1

y = 3

(2, 3)

3.

4x + 6 = 2x +2

2x = - 4

x = -2

y = 2(-2) + 2

y = -2

(-2, -2)

4.

-4x + 10 = -2x

-2x = - 10

x = 5

y = - 10

(5, -10)

5.

3x - 2 = -2x + 3

5x = 5

x = 1

y = 1

(1, 1)

6.

-7x - 4 = x + 4

-8x = 8

x = -1

y = 3

(-1, 3)

i'm pretty sure it's c. nvm

3x + 4y -25 =0 represents the amount of change sianna should recieve