Answer:
2x−3=x
Move all terms containing x
to the left side of the equation.
Subtract x
from both sides of the equation.
2x−3−x=0
Subtract x
from 2x
x−3=0
Add 3
to both sides of the equation.
x=3
Step-by-step explanation:
11 - ( - 3 5/8) will equivalent to
11 + 3⅝ = 14⅝
perimeter = sum of all sides
27 = 9+7.8+x
x (third side) = 10.2
First term (a1) is -1
recursive formula goes like this

is the nth term

is the term before that
we normally have

we see each term is multipying by -3 to get next one
so that would be

where a1=-1
the 3rd option is correct except that it is the explicit formula
so answer is 2nd one