21-(10-s)=

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


Simplifying
21 + -1(10 + -1s) = 0
21 + (10 * -1 + -1s * -1) = 0
21 + (-10 + 1s) = 0

Combine like terms: 21 + -10 = 11
11 + 1s = 0

Solving
11 + 1s = 0

Solving for variable 's'.

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

Add '-11' to each side of the equation.
11 + -11 + 1s = 0 + -11

Combine like terms: 11 + -11 = 0
0 + 1s = 0 + -11
1s = 0 + -11

Combine like terms: 0 + -11 = -11
1s = -11

Divide each side by '1'.
s = -11

Simplifying
s = -11

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