X1 - 3 = x2
subtract 3 from the first value to get the second one


(provided that
)
Then

(just moving around a factor of
)

(multiply by
)
Answer:
(-2, 6)
Step-by-step explanation:
Equation of a circle is:
(x − h)² + (y − k)² = r²
where (h, k) is the center and r is the radius.
In this case, the center is (-2, 6).
If we are trying to find x then it is 21
all you have to do is set them equal to each other
so (4x+3)=87
let me know if I need to explain more
The coefficient of

is
2.
_____
You have used the symbol for "times." If you mean x (the variable), the answer is still the same. The coefficent of

is still
2.