Simplify the expression and explain each step
a: 4(3x + 2)-2

factor the expression completely
b: 20b - 16

A: For this equation, follow BIDMAS, so first multiply each value inside the brackets by 4:
= 4*3x + 4*2 - 2              ("*" meaning multiply)
= 12x + 8 - 2
= 12x +6
And I think you're done.
B: For this you need to put in brackets, so find the highest common factor of the values and put it outside the brackets:
Both 20 and 16 are divisible by 4 so
4(5b - 4)
So that when you multiply out the brackets you get back to 20b - 16.
Hope his helps.

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!