4.2u-3.2u+.5=-6.3

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Solution for 4.2u-3.2u+.5=-6.3 equation: 


Simplifying
4.2u + -3.2u + 0.5 = -6.3

Reorder the terms:
0.5 + 4.2u + -3.2u = -6.3

Combine like terms: 4.2u + -3.2u = 1u
0.5 + 1u = -6.3

Solving
0.5 + 1u = -6.3

Solving for variable 'u'.

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

Add '-0.5' to each side of the equation.
0.5 + -0.5 + 1u = -6.3 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + 1u = -6.3 + -0.5
1u = -6.3 + -0.5

Combine like terms: -6.3 + -0.5 = -6.8
1u = -6.8

Divide each side by '1'.
u = -6.8

Simplifying
u = -6.8

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