9s-21=-17+7s

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Solution for 9s-21=-17+7s equation:


Simplifying
9s + -21 = -17 + 7s

Reorder the terms:
-21 + 9s = -17 + 7s

Solving
-21 + 9s = -17 + 7s

Solving for variable 's'.

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

Add '-7s' to each side of the equation.
-21 + 9s + -7s = -17 + 7s + -7s

Combine like terms: 9s + -7s = 2s
-21 + 2s = -17 + 7s + -7s

Combine like terms: 7s + -7s = 0
-21 + 2s = -17 + 0
-21 + 2s = -17

Add '21' to each side of the equation.
-21 + 21 + 2s = -17 + 21

Combine like terms: -21 + 21 = 0
0 + 2s = -17 + 21
2s = -17 + 21

Combine like terms: -17 + 21 = 4
2s = 4

Divide each side by '2'.
s = 2

Simplifying
s = 2

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