-21=3(2x+3)

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


Simplifying
-21 = 3(2x + 3)

Reorder the terms:
-21 = 3(3 + 2x)
-21 = (3 * 3 + 2x * 3)
-21 = (9 + 6x)

Solving
-21 = 9 + 6x

Solving for variable 'x'.

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

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

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

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

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

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

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

Simplifying
x = -5

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