Which expression is equivalent to this one?
9(x – 23)
a 9x – 23
b 9x – 9 · 23
c 9x · (–23)
d 9 + x – 23
9(x – 23)
a 9x – 23
b 9x – 9 · 23
c 9x · (–23)
d 9 + x – 23