2s-15=-21+4s

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Solution for 2s-15=-21+4s equation:


Simplifying
2s + -15 = -21 + 4s

Reorder the terms:
-15 + 2s = -21 + 4s

Solving
-15 + 2s = -21 + 4s

Solving for variable 's'.

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

Add '-4s' to each side of the equation.
-15 + 2s + -4s = -21 + 4s + -4s

Combine like terms: 2s + -4s = -2s
-15 + -2s = -21 + 4s + -4s

Combine like terms: 4s + -4s = 0
-15 + -2s = -21 + 0
-15 + -2s = -21

Add '15' to each side of the equation.
-15 + 15 + -2s = -21 + 15

Combine like terms: -15 + 15 = 0
0 + -2s = -21 + 15
-2s = -21 + 15

Combine like terms: -21 + 15 = -6
-2s = -6

Divide each side by '-2'.
s = 3

Simplifying
s = 3

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