2.1=u+7.9

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Solution for 2.1=u+7.9 equation: 


Simplifying
2.1 = u + 7.9

Reorder the terms:
2.1 = 7.9 + u

Solving
2.1 = 7.9 + u

Solving for variable 'u'.

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

Add '-1u' to each side of the equation.
2.1 + -1u = 7.9 + u + -1u

Combine like terms: u + -1u = 0
2.1 + -1u = 7.9 + 0
2.1 + -1u = 7.9

Add '-2.1' to each side of the equation.
2.1 + -2.1 + -1u = 7.9 + -2.1

Combine like terms: 2.1 + -2.1 = 0.0
0.0 + -1u = 7.9 + -2.1
-1u = 7.9 + -2.1

Combine like terms: 7.9 + -2.1 = 5.8
-1u = 5.8

Divide each side by '-1'.
u = -5.8

Simplifying
u = -5.8

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