Help please, w-5-4= -8-6w+8w?

w = -1

Step-by-step explanation:

w-5-4= -8-6w+8w                      ⇒ simplifyw - 9 = - 8 + 2w                          ⇒ add 9 - 2w to both sidesw - 2w = - 8 + 9                          ⇒ simplify-w = 1                                           ⇒ multiply both sides by -1w = -1                                           ⇒ answer

Step-by-step explanation:

Combining like terms.

Adding -w and 8 to both sides.

Step-by-step explanation:

Answer this by inserting a positive number between the '6x' and the '=' sign and then subtracting the same number:

x^2 + 6x + 9 - 9 = -2

Where does the "9" come from?  Take half the coefficient of x (which is 6) and square the result (obtaining 36).  Now add 36 after the "6x" and then subtract 36:

x^2 + 6x + 9 = 7

Rewrite this with a perfect square on the left side:

(x + 3)^2 = 7            Here we have successfully "completed the square."