7u-18=9(u-4)

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Solution for 7u-18=9(u-4) equation:


Simplifying
7u + -18 = 9(u + -4)

Reorder the terms:
-18 + 7u = 9(u + -4)

Reorder the terms:
-18 + 7u = 9(-4 + u)
-18 + 7u = (-4 * 9 + u * 9)
-18 + 7u = (-36 + 9u)

Solving
-18 + 7u = -36 + 9u

Solving for variable 'u'.

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

Add '-9u' to each side of the equation.
-18 + 7u + -9u = -36 + 9u + -9u

Combine like terms: 7u + -9u = -2u
-18 + -2u = -36 + 9u + -9u

Combine like terms: 9u + -9u = 0
-18 + -2u = -36 + 0
-18 + -2u = -36

Add '18' to each side of the equation.
-18 + 18 + -2u = -36 + 18

Combine like terms: -18 + 18 = 0
0 + -2u = -36 + 18
-2u = -36 + 18

Combine like terms: -36 + 18 = -18
-2u = -18

Divide each side by '-2'.
u = 9

Simplifying
u = 9

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