4-2 (7+8x) = 12-6 (2x-7) + 4x

4 - 2 (7 + 8x) = 12 - 6 (2x - 7) + 4x

4 - 2 (7 + 8x) = 12 - 6 (2x - 7) + 4x

4 + (-2) (7) + (-2) (8x) = 12 + (-6) (2x) + (-6) (-7) + 4x (Distribute)

4 + - 14 + - 16x = 12 + - 12x + 42 + 4x

( - 16x) + (4 + - 14) = ( - 12x + 4x) + (12+42) (Combine Like Terms)

- 16x + - 10 = - 8x + 54

- 16x - 10 = - 8x + 54

Step 2: Add 8x to both sides.

- 16x - 10 + 8x = - 8x + 54 + 8x

- 8x - 10 = 54

Step 3: Add 10 to both sides.

- 8x - 10 + 10 = 54+10

- 8x = 64

Step 4: Divide both sides by - 8.

- 8x - 8 = 64 - 8

x = - 8