39 - 7X = - 4 (7X + 7) + 4

- = minus sign

- = negative sign

x=-3

Step-by-step explanation:

39 - 7X = - 4 (7X + 7) + 4

Distribute

39 - 7x = - 28x - 28 + 4

Combine like terms

39 - 7x = -28x - 24

Add 28x to each side

39 - 7x+28x = -28x+28x - 24

39+21x=-24

Subtract 39 from each side

39-39+21x = - 24 - 39

21x = - 63

Divide by 21

21x/21 = - 63/21

x = - 3