21=7-2(3x+2)

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Solution for 21=7-2(3x+2) equation:


Simplifying
21 = 7 + -2(3x + 2)

Reorder the terms:
21 = 7 + -2(2 + 3x)
21 = 7 + (2 * -2 + 3x * -2)
21 = 7 + (-4 + -6x)

Combine like terms: 7 + -4 = 3
21 = 3 + -6x

Solving
21 = 3 + -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 = 3 + -6x + 6x

Combine like terms: -6x + 6x = 0
21 + 6x = 3 + 0
21 + 6x = 3

Add '-21' to each side of the equation.
21 + -21 + 6x = 3 + -21

Combine like terms: 21 + -21 = 0
0 + 6x = 3 + -21
6x = 3 + -21

Combine like terms: 3 + -21 = -18
6x = -18

Divide each side by '6'.
x = -3

Simplifying
x = -3

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