X-3(X+10)=12

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Solution for X-3(X+10)=12 equation: 


Simplifying
X + -3(X + 10) = 12

Reorder the terms:
X + -3(10 + X) = 12
X + (10 * -3 + X * -3) = 12
X + (-30 + -3X) = 12

Reorder the terms:
-30 + X + -3X = 12

Combine like terms: X + -3X = -2X
-30 + -2X = 12

Solving
-30 + -2X = 12

Solving for variable 'X'.

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

Add '30' to each side of the equation.
-30 + 30 + -2X = 12 + 30

Combine like terms: -30 + 30 = 0
0 + -2X = 12 + 30
-2X = 12 + 30

Combine like terms: 12 + 30 = 42
-2X = 42

Divide each side by '-2'.
X = -21

Simplifying
X = -21

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