-2.8=-0.7u+0.3u

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Solution for -2.8=-0.7u+0.3u equation:


Simplifying
-2.8 = -0.7u + 0.3u

Combine like terms: -0.7u + 0.3u = -0.4u
-2.8 = -0.4u

Solving
-2.8 = -0.4u

Solving for variable 'u'.

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

Add '0.4u' to each side of the equation.
-2.8 + 0.4u = -0.4u + 0.4u

Combine like terms: -0.4u + 0.4u = 0.0
-2.8 + 0.4u = 0.0

Add '2.8' to each side of the equation.
-2.8 + 2.8 + 0.4u = 0.0 + 2.8

Combine like terms: -2.8 + 2.8 = 0.0
0.0 + 0.4u = 0.0 + 2.8
0.4u = 0.0 + 2.8

Combine like terms: 0.0 + 2.8 = 2.8
0.4u = 2.8

Divide each side by '0.4'.
u = 7

Simplifying
u = 7

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