add the rational expressions:

3x/x-1 + 4/7x

i want to completely understand so give a step by step!

usually if it comes to worse, we can always just use the product of all denominators as the LCD, it will just be a CD but not LCD but as good, but usually  we try to use the LCD.

in this case our denominators do not have a GCF, so the LCD will just be their product, so we'll use that.

a

step-by-step explanation:

when a number is between two straight lines it means the absolute value.

to find absolute value you need to know how many numbers is that number away from 0.

when finding absolute value the number will always come out positive

so absolute value of -3 is 3

absolute value of 3/2 is 3/2

absolute value of -2 is 2

absolute value of 3.5 is 3.5

absolute value of -1 is 1

now put these numbers in order:

a)   |-1|, |3/2|, |-2|, |-3|, |3.5|

is there a picture

step-by-step explanation: