s*4-21=19

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Solution for s*4-21=19 equation:


Simplifying
s * 4 + -21 = 19

Reorder the terms for easier multiplication:
4s + -21 = 19

Reorder the terms:
-21 + 4s = 19

Solving
-21 + 4s = 19

Solving for variable 's'.

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

Add '21' to each side of the equation.
-21 + 21 + 4s = 19 + 21

Combine like terms: -21 + 21 = 0
0 + 4s = 19 + 21
4s = 19 + 21

Combine like terms: 19 + 21 = 40
4s = 40

Divide each side by '4'.
s = 10

Simplifying
s = 10

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