9-.80(u-3)=1

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Solution for 9-.80(u-3)=1 equation: 


Simplifying
9 + -0.80(u + -3) = 1

Reorder the terms:
9 + -0.80(-3 + u) = 1
9 + (-3 * -0.80 + u * -0.80) = 1
9 + (2.4 + -0.80u) = 1

Combine like terms: 9 + 2.4 = 11.4
11.4 + -0.80u = 1

Solving
11.4 + -0.80u = 1

Solving for variable 'u'.

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

Add '-11.4' to each side of the equation.
11.4 + -11.4 + -0.80u = 1 + -11.4

Combine like terms: 11.4 + -11.4 = 0.0
0.0 + -0.80u = 1 + -11.4
-0.80u = 1 + -11.4

Combine like terms: 1 + -11.4 = -10.4
-0.80u = -10.4

Divide each side by '-0.80'.
u = 13

Simplifying
u = 13

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