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is 27+9=-52x+40x

Solve for x:
36 = -12 x

36 = -12 x is equivalent to -12 x = 36:
-12 x = 36

Divide both sides of -12 x = 36 by -12:
(-12 x)/(-12) = 36/(-12)

(-12)/(-12) = 1:
x = 36/(-12)

The gcd of 36 and -12 is 12, so 36/(-12) = (12×3)/(12 (-1)) = 12/12×3/(-1) = 3/(-1):
x = 3/(-1)

Multiply numerator and denominator of 3/(-1) by -1:
Answer: | 
| x = -3

i dont under stand 

Which bit don't you understand?

The instructions look pretty good.  Thanks answering guest :)

all