7u-45=9(u-7)

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Solution for 7u-45=9(u-7) equation:


Simplifying
7u + -45 = 9(u + -7)

Reorder the terms:
-45 + 7u = 9(u + -7)

Reorder the terms:
-45 + 7u = 9(-7 + u)
-45 + 7u = (-7 * 9 + u * 9)
-45 + 7u = (-63 + 9u)

Solving
-45 + 7u = -63 + 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.
-45 + 7u + -9u = -63 + 9u + -9u

Combine like terms: 7u + -9u = -2u
-45 + -2u = -63 + 9u + -9u

Combine like terms: 9u + -9u = 0
-45 + -2u = -63 + 0
-45 + -2u = -63

Add '45' to each side of the equation.
-45 + 45 + -2u = -63 + 45

Combine like terms: -45 + 45 = 0
0 + -2u = -63 + 45
-2u = -63 + 45

Combine like terms: -63 + 45 = -18
-2u = -18

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

Simplifying
u = 9

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