s+55-3s=21

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Solution for s+55-3s=21 equation:


Simplifying
s + 55 + -3s = 21

Reorder the terms:
55 + s + -3s = 21

Combine like terms: s + -3s = -2s
55 + -2s = 21

Solving
55 + -2s = 21

Solving for variable 's'.

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

Add '-55' to each side of the equation.
55 + -55 + -2s = 21 + -55

Combine like terms: 55 + -55 = 0
0 + -2s = 21 + -55
-2s = 21 + -55

Combine like terms: 21 + -55 = -34
-2s = -34

Divide each side by '-2'.
s = 17

Simplifying
s = 17

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