7s-21=11+3s

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Solution for 7s-21=11+3s equation:


Simplifying
7s + -21 = 11 + 3s

Reorder the terms:
-21 + 7s = 11 + 3s

Solving
-21 + 7s = 11 + 3s

Solving for variable 's'.

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

Add '-3s' to each side of the equation.
-21 + 7s + -3s = 11 + 3s + -3s

Combine like terms: 7s + -3s = 4s
-21 + 4s = 11 + 3s + -3s

Combine like terms: 3s + -3s = 0
-21 + 4s = 11 + 0
-21 + 4s = 11

Add '21' to each side of the equation.
-21 + 21 + 4s = 11 + 21

Combine like terms: -21 + 21 = 0
0 + 4s = 11 + 21
4s = 11 + 21

Combine like terms: 11 + 21 = 32
4s = 32

Divide each side by '4'.
s = 8

Simplifying
s = 8

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