-4=-7+u

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Solution for -4=-7+u equation:


Simplifying
-4 = -7 + u

Solving
-4 = -7 + 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.
-4 + -1u = -7 + u + -1u

Combine like terms: u + -1u = 0
-4 + -1u = -7 + 0
-4 + -1u = -7

Add '4' to each side of the equation.
-4 + 4 + -1u = -7 + 4

Combine like terms: -4 + 4 = 0
0 + -1u = -7 + 4
-1u = -7 + 4

Combine like terms: -7 + 4 = -3
-1u = -3

Divide each side by '-1'.
u = 3

Simplifying
u = 3

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