3s+4=s+21-5

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Solution for 3s+4=s+21-5 equation:


Simplifying
3s + 4 = s + 21 + -5

Reorder the terms:
4 + 3s = s + 21 + -5

Reorder the terms:
4 + 3s = 21 + -5 + s

Combine like terms: 21 + -5 = 16
4 + 3s = 16 + s

Solving
4 + 3s = 16 + s

Solving for variable 's'.

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

Add '-1s' to each side of the equation.
4 + 3s + -1s = 16 + s + -1s

Combine like terms: 3s + -1s = 2s
4 + 2s = 16 + s + -1s

Combine like terms: s + -1s = 0
4 + 2s = 16 + 0
4 + 2s = 16

Add '-4' to each side of the equation.
4 + -4 + 2s = 16 + -4

Combine like terms: 4 + -4 = 0
0 + 2s = 16 + -4
2s = 16 + -4

Combine like terms: 16 + -4 = 12
2s = 12

Divide each side by '2'.
s = 6

Simplifying
s = 6

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