If you need an equation it is -3.4x=21.5
You simply divide both sides by -3.4 to get x=-6.32
if that's not right then just get on a calculator and calculate by doing what I said to divide
Answer:


Step-by-step explanation:
Let
x ---> the number
we know that
The algebraic expression is equal to multiply the number by 4, add 5 and equal 8
so

Solve for x
subtract 5 both sides

Divide by 4 both sides

(y-y1)=m(x-x1) where m is the slope and (x1 and y1 ) are the points
(y-2) = 3(x-2)
y-2=3x-6 add 2 to each side
y-2+2=3x-6+2
y=3x-4
Answer:
yes it is an equilateral triangle