-21=-7-s

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Solution for -21=-7-s equation:


Simplifying
-21 = -7 + -1s

Solving
-21 = -7 + -1s

Solving for variable 's'.

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

Add 's' to each side of the equation.
-21 + s = -7 + -1s + s

Combine like terms: -1s + s = 0
-21 + s = -7 + 0
-21 + s = -7

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

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

Combine like terms: -7 + 21 = 14
s = 14

Simplifying
s = 14

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