3-3(2x+4)=21

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Solution for 3-3(2x+4)=21 equation:


Simplifying
3 + -3(2x + 4) = 21

Reorder the terms:
3 + -3(4 + 2x) = 21
3 + (4 * -3 + 2x * -3) = 21
3 + (-12 + -6x) = 21

Combine like terms: 3 + -12 = -9
-9 + -6x = 21

Solving
-9 + -6x = 21

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + -6x = 21 + 9

Combine like terms: -9 + 9 = 0
0 + -6x = 21 + 9
-6x = 21 + 9

Combine like terms: 21 + 9 = 30
-6x = 30

Divide each side by '-6'.
x = -5

Simplifying
x = -5

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