87=21+6s

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Solution for 87=21+6s equation:


Simplifying
87 = 21 + 6s

Solving
87 = 21 + 6s

Solving for variable 's'.

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

Add '-6s' to each side of the equation.
87 + -6s = 21 + 6s + -6s

Combine like terms: 6s + -6s = 0
87 + -6s = 21 + 0
87 + -6s = 21

Add '-87' to each side of the equation.
87 + -87 + -6s = 21 + -87

Combine like terms: 87 + -87 = 0
0 + -6s = 21 + -87
-6s = 21 + -87

Combine like terms: 21 + -87 = -66
-6s = -66

Divide each side by '-6'.
s = 11

Simplifying
s = 11

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