10s-9(s-10)+9=80

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Solution for 10s-9(s-10)+9=80 equation:


Simplifying
10s + -9(s + -10) + 9 = 80

Reorder the terms:
10s + -9(-10 + s) + 9 = 80
10s + (-10 * -9 + s * -9) + 9 = 80
10s + (90 + -9s) + 9 = 80

Reorder the terms:
90 + 9 + 10s + -9s = 80

Combine like terms: 90 + 9 = 99
99 + 10s + -9s = 80

Combine like terms: 10s + -9s = 1s
99 + 1s = 80

Solving
99 + 1s = 80

Solving for variable 's'.

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

Add '-99' to each side of the equation.
99 + -99 + 1s = 80 + -99

Combine like terms: 99 + -99 = 0
0 + 1s = 80 + -99
1s = 80 + -99

Combine like terms: 80 + -99 = -19
1s = -19

Divide each side by '1'.
s = -19

Simplifying
s = -19

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