Algebraic Math Problem?

Question

6[13-2(4-1)]

Please explain step by step, I could do this multiple ways and I don't know exactly the right way!

Answer 1

4-1=3

2*(4-1) = 6

13-6 = 7

6 * 7 = 42

the answer is 42

first parenthenes then multiplication/division and last addition/subtraction

Answer 2

Do the bit in the inner brackets first

6[13-2(3)]

Then do in the brackets, first the multiplication

6[13-6]

Then in the brackets the rest of it

6[7] = 42

remember BODMAS, Brackets over Division, Multiplication, Addition, Subtraction.

This is the order, use it even if you have sums inside  brackets.

Answer 3

6[13-2(4-1)]            Original equation

6[13-2(3)]                 In brackets

6[13-6]                  multiply -2 by 3

6(7)                  subtract in parentheses

42               answer