-10(s+3)=-21

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Solution for -10(s+3)=-21 equation: 


Simplifying
-10(s + 3) = -21

Reorder the terms:
-10(3 + s) = -21
(3 * -10 + s * -10) = -21
(-30 + -10s) = -21

Solving
-30 + -10s = -21

Solving for variable 's'.

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

Add '30' to each side of the equation.
-30 + 30 + -10s = -21 + 30

Combine like terms: -30 + 30 = 0
0 + -10s = -21 + 30
-10s = -21 + 30

Combine like terms: -21 + 30 = 9
-10s = 9

Divide each side by '-10'.
s = -0.9

Simplifying
s = -0.9

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