-3(3+12+6)=x

Solution for -3(3+12+6)=x equation:

Simplifying
-3(3 + 12 + 6) = x

Combine like terms: 3 + 12 = 15
-3(15 + 6) = x

Combine like terms: 15 + 6 = 21
-3(21) = x

Multiply -3 * 21
-63 = x

Solving
-63 = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-63 + -1x = x + -1x

Combine like terms: x + -1x = 0
-63 + -1x = 0

Add '63' to each side of the equation.
-63 + 63 + -1x = 0 + 63

Combine like terms: -63 + 63 = 0
0 + -1x = 0 + 63
-1x = 0 + 63

Combine like terms: 0 + 63 = 63
-1x = 63

Divide each side by '-1'.
x = -63

Simplifying
x = -63