18s+2s+3s-21s-s+1=13

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Solution for 18s+2s+3s-21s-s+1=13 equation:


Simplifying
18s + 2s + 3s + -21s + -1s + 1 = 13

Reorder the terms:
1 + 18s + 2s + 3s + -21s + -1s = 13

Combine like terms: 18s + 2s = 20s
1 + 20s + 3s + -21s + -1s = 13

Combine like terms: 20s + 3s = 23s
1 + 23s + -21s + -1s = 13

Combine like terms: 23s + -21s = 2s
1 + 2s + -1s = 13

Combine like terms: 2s + -1s = 1s
1 + 1s = 13

Solving
1 + 1s = 13

Solving for variable 's'.

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

Add '-1' to each side of the equation.
1 + -1 + 1s = 13 + -1

Combine like terms: 1 + -1 = 0
0 + 1s = 13 + -1
1s = 13 + -1

Combine like terms: 13 + -1 = 12
1s = 12

Divide each side by '1'.
s = 12

Simplifying
s = 12

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