7s-10=9s-40

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Solution for 7s-10=9s-40 equation: 


Simplifying
7s + -10 = 9s + -40

Reorder the terms:
-10 + 7s = 9s + -40

Reorder the terms:
-10 + 7s = -40 + 9s

Solving
-10 + 7s = -40 + 9s

Solving for variable 's'.

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

Add '-9s' to each side of the equation.
-10 + 7s + -9s = -40 + 9s + -9s

Combine like terms: 7s + -9s = -2s
-10 + -2s = -40 + 9s + -9s

Combine like terms: 9s + -9s = 0
-10 + -2s = -40 + 0
-10 + -2s = -40

Add '10' to each side of the equation.
-10 + 10 + -2s = -40 + 10

Combine like terms: -10 + 10 = 0
0 + -2s = -40 + 10
-2s = -40 + 10

Combine like terms: -40 + 10 = -30
-2s = -30

Divide each side by '-2'.
s = 15

Simplifying
s = 15

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