90=20+5u

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Solution for 90=20+5u equation:


Simplifying
90 = 20 + 5u

Solving
90 = 20 + 5u

Solving for variable 'u'.

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

Add '-5u' to each side of the equation.
90 + -5u = 20 + 5u + -5u

Combine like terms: 5u + -5u = 0
90 + -5u = 20 + 0
90 + -5u = 20

Add '-90' to each side of the equation.
90 + -90 + -5u = 20 + -90

Combine like terms: 90 + -90 = 0
0 + -5u = 20 + -90
-5u = 20 + -90

Combine like terms: 20 + -90 = -70
-5u = -70

Divide each side by '-5'.
u = 14

Simplifying
u = 14

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