42+-2=s

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Solution for 42+-2=s equation:


Simplifying
42 + -2 = s

Combine like terms: 42 + -2 = 40
40 = s

Solving
40 = s

Solving for variable 's'.

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

Add '-1s' to each side of the equation.
40 + -1s = s + -1s

Combine like terms: s + -1s = 0
40 + -1s = 0

Add '-40' to each side of the equation.
40 + -40 + -1s = 0 + -40

Combine like terms: 40 + -40 = 0
0 + -1s = 0 + -40
-1s = 0 + -40

Combine like terms: 0 + -40 = -40
-1s = -40

Divide each side by '-1'.
s = 40

Simplifying
s = 40

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