-(2x+7)=21

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


Simplifying
-1(2x + 7) = 21

Reorder the terms:
-1(7 + 2x) = 21
(7 * -1 + 2x * -1) = 21
(-7 + -2x) = 21

Solving
-7 + -2x = 21

Solving for variable 'x'.

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

Add '7' to each side of the equation.
-7 + 7 + -2x = 21 + 7

Combine like terms: -7 + 7 = 0
0 + -2x = 21 + 7
-2x = 21 + 7

Combine like terms: 21 + 7 = 28
-2x = 28

Divide each side by '-2'.
x = -14

Simplifying
x = -14

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