0=-7x-21

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Solution for 0=-7x-21 equation: 


Simplifying
0 = -7x + -21

Reorder the terms:
0 = -21 + -7x

Solving
0 = -21 + -7x

Solving for variable 'x'.

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

Add '7x' to each side of the equation.
0 + 7x = -21 + -7x + 7x
Remove the zero:
7x = -21 + -7x + 7x

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

Divide each side by '7'.
x = -3

Simplifying
x = -3

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