84=-u+270

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Solution for 84=-u+270 equation:


Simplifying
84 = -1u + 270

Reorder the terms:
84 = 270 + -1u

Solving
84 = 270 + -1u

Solving for variable 'u'.

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

Add 'u' to each side of the equation.
84 + u = 270 + -1u + u

Combine like terms: -1u + u = 0
84 + u = 270 + 0
84 + u = 270

Add '-84' to each side of the equation.
84 + -84 + u = 270 + -84

Combine like terms: 84 + -84 = 0
0 + u = 270 + -84
u = 270 + -84

Combine like terms: 270 + -84 = 186
u = 186

Simplifying
u = 186

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