91+7u=21u

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Solution for 91+7u=21u equation:


Simplifying
91 + 7u = 21u

Solving
91 + 7u = 21u

Solving for variable 'u'.

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

Add '-21u' to each side of the equation.
91 + 7u + -21u = 21u + -21u

Combine like terms: 7u + -21u = -14u
91 + -14u = 21u + -21u

Combine like terms: 21u + -21u = 0
91 + -14u = 0

Add '-91' to each side of the equation.
91 + -91 + -14u = 0 + -91

Combine like terms: 91 + -91 = 0
0 + -14u = 0 + -91
-14u = 0 + -91

Combine like terms: 0 + -91 = -91
-14u = -91

Divide each side by '-14'.
u = 6.5

Simplifying
u = 6.5

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