Samuel used the distributive property to simplify the expression - 6 (-2 - 10x) - 7x and came up with 53x - 12 which is incorrect. What is Samuel's mistake? What is the correct answer?

He messed up the signs, most likely by multiplying incorrectly. It should be 53x+12.

Step-by-step explanation:

You begin by multiplying both - 2 and - 10x by - 6.

Remember a negative times a negative makes a positive.

-6 (-2-10x)

12+60x

Then you need to combine like terms which are 60x and - 7x

60x-7x

53x

So that means the final answer will be

53x+12