-2(x+3x)=18

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Solution for -2(x+3x)=18 equation: 


Simplifying
-2(x + 3x) = 18

Combine like terms: x + 3x = 4x
-2(4x) = 18

Remove parenthesis around (4x)
-2 * 4x = 18

Multiply -2 * 4
-8x = 18

Solving
-8x = 18

Solving for variable 'x'.

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

Divide each side by '-8'.
x = -2.25

Simplifying
x = -2.25

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