9(u-9)=4u-31

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Solution for 9(u-9)=4u-31 equation:


Simplifying
9(u + -9) = 4u + -31

Reorder the terms:
9(-9 + u) = 4u + -31
(-9 * 9 + u * 9) = 4u + -31
(-81 + 9u) = 4u + -31

Reorder the terms:
-81 + 9u = -31 + 4u

Solving
-81 + 9u = -31 + 4u

Solving for variable 'u'.

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

Add '-4u' to each side of the equation.
-81 + 9u + -4u = -31 + 4u + -4u

Combine like terms: 9u + -4u = 5u
-81 + 5u = -31 + 4u + -4u

Combine like terms: 4u + -4u = 0
-81 + 5u = -31 + 0
-81 + 5u = -31

Add '81' to each side of the equation.
-81 + 81 + 5u = -31 + 81

Combine like terms: -81 + 81 = 0
0 + 5u = -31 + 81
5u = -31 + 81

Combine like terms: -31 + 81 = 50
5u = 50

Divide each side by '5'.
u = 10

Simplifying
u = 10

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