7s-9=-12+8s

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Solution for 7s-9=-12+8s equation:


Simplifying
7s + -9 = -12 + 8s

Reorder the terms:
-9 + 7s = -12 + 8s

Solving
-9 + 7s = -12 + 8s

Solving for variable 's'.

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

Add '-8s' to each side of the equation.
-9 + 7s + -8s = -12 + 8s + -8s

Combine like terms: 7s + -8s = -1s
-9 + -1s = -12 + 8s + -8s

Combine like terms: 8s + -8s = 0
-9 + -1s = -12 + 0
-9 + -1s = -12

Add '9' to each side of the equation.
-9 + 9 + -1s = -12 + 9

Combine like terms: -9 + 9 = 0
0 + -1s = -12 + 9
-1s = -12 + 9

Combine like terms: -12 + 9 = -3
-1s = -3

Divide each side by '-1'.
s = 3

Simplifying
s = 3

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