-7s+4s=21

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Solution for -7s+4s=21 equation: 


Simplifying
-7s + 4s = 21

Combine like terms: -7s + 4s = -3s
-3s = 21

Solving
-3s = 21

Solving for variable 's'.

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

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

Simplifying
s = -7

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