-2[x+3y]=18

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Solution for -2[x+3y]=18 equation: 


Simplifying
-2[x + 3y] = 18
[x * -2 + 3y * -2] = 18
[-2x + -6y] = 18

Solving
-2x + -6y = 18

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '6y' to each side of the equation.
-2x + -6y + 6y = 18 + 6y

Combine like terms: -6y + 6y = 0
-2x + 0 = 18 + 6y
-2x = 18 + 6y

Divide each side by '-2'.
x = -9 + -3y

Simplifying
x = -9 + -3y

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