s*4-39=45

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Solution for s*4-39=45 equation:


Simplifying
s * 4 + -39 = 45

Reorder the terms for easier multiplication:
4s + -39 = 45

Reorder the terms:
-39 + 4s = 45

Solving
-39 + 4s = 45

Solving for variable 's'.

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

Add '39' to each side of the equation.
-39 + 39 + 4s = 45 + 39

Combine like terms: -39 + 39 = 0
0 + 4s = 45 + 39
4s = 45 + 39

Combine like terms: 45 + 39 = 84
4s = 84

Divide each side by '4'.
s = 21

Simplifying
s = 21

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