4s-42=30

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Solution for 4s-42=30 equation: 


Simplifying
4s + -42 = 30

Reorder the terms:
-42 + 4s = 30

Solving
-42 + 4s = 30

Solving for variable 's'.

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

Add '42' to each side of the equation.
-42 + 42 + 4s = 30 + 42

Combine like terms: -42 + 42 = 0
0 + 4s = 30 + 42
4s = 30 + 42

Combine like terms: 30 + 42 = 72
4s = 72

Divide each side by '4'.
s = 18

Simplifying
s = 18

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