Start from

It may be useful to multiply the whole expression by 2, in order to get rid of denominators:

Distribute the negative sign in the left hand side:

Move all terms involving x to the left, and all constants to the right:

Sum like terms:

DIvide both sides -5:

the x s are the independent variable so any direct change to them is changing the independent. like the second one has -5 on the x
Difference
1 2 3 4 5 ... n
difference is 1
Answer: 55
Step-by-step explanation:
By the alternate exterior angles theorem,

Answer:
The answer is 91.
Step-by-step explanation:
Since 2+2+2=6 and you subtract 2 that would now be 6-2, and that is 4.
87+4=91.
Simply 6-2=4
87+4=91
:)