Answer:
Option b and option f
Step-by-step explanation:
-6(3x - 7) = -18x + 42 so we will check for of the given options if they are equal to this.
a. -18x - 7 ---> NO
b. 4(3x + 5) - 2(15x - 11) = 12x + 20 - 30x + 22
= -18x +42 ---> YES
c. 2x - 7 - 5(4x - 7) = 2x - 7 - 20x + 35
= -18x + 28 ---> NO
d. 4 - 10(3x - 7) = 4 - 30x + 70
= -30x + 74 ---> NO
e. 6(3x + 7) = 18x + 42 ---> NO
f. -2(9x - 21) = -18x + 42 ---> YES
Therefore, options b and f are equivalent to -6(3x - 7).
