Zoe shows her work in finding the solution to 9 - 7x = 7 - 4 (2x 3). which choice describes the error in her solution?

I'll assume the above equation is: 9 - 7x = 7 - 4 (2x+3)

* do distributive multiplication

9 - 7x = 7 - 8x - 12

*move like terms

-7x + 8x = 7 - 12 - 9

* solve for x

x = 7 - 21

x = - 14

To check, substitute x by its value - 14

9 - 7x = 7 - 4 (2x+3)

9 - 7 (-14) = 7 - 4[2 (-14) + 3]

9 + 98 = 7 - 4 (-28 + 3)

107 = 7 - 4 (-25)

107 = 7 + 100

107 = 107