7+3s-2=9s+21-4s

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Solution for 7+3s-2=9s+21-4s equation:


Simplifying
7 + 3s + -2 = 9s + 21 + -4s

Reorder the terms:
7 + -2 + 3s = 9s + 21 + -4s

Combine like terms: 7 + -2 = 5
5 + 3s = 9s + 21 + -4s

Reorder the terms:
5 + 3s = 21 + 9s + -4s

Combine like terms: 9s + -4s = 5s
5 + 3s = 21 + 5s

Solving
5 + 3s = 21 + 5s

Solving for variable 's'.

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

Add '-5s' to each side of the equation.
5 + 3s + -5s = 21 + 5s + -5s

Combine like terms: 3s + -5s = -2s
5 + -2s = 21 + 5s + -5s

Combine like terms: 5s + -5s = 0
5 + -2s = 21 + 0
5 + -2s = 21

Add '-5' to each side of the equation.
5 + -5 + -2s = 21 + -5

Combine like terms: 5 + -5 = 0
0 + -2s = 21 + -5
-2s = 21 + -5

Combine like terms: 21 + -5 = 16
-2s = 16

Divide each side by '-2'.
s = -8

Simplifying
s = -8

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