6(u-3)=9u-21

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Solution for 6(u-3)=9u-21 equation:


Simplifying
6(u + -3) = 9u + -21

Reorder the terms:
6(-3 + u) = 9u + -21
(-3 * 6 + u * 6) = 9u + -21
(-18 + 6u) = 9u + -21

Reorder the terms:
-18 + 6u = -21 + 9u

Solving
-18 + 6u = -21 + 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 + 6u + -9u = -21 + 9u + -9u

Combine like terms: 6u + -9u = -3u
-18 + -3u = -21 + 9u + -9u

Combine like terms: 9u + -9u = 0
-18 + -3u = -21 + 0
-18 + -3u = -21

Add '18' to each side of the equation.
-18 + 18 + -3u = -21 + 18

Combine like terms: -18 + 18 = 0
0 + -3u = -21 + 18
-3u = -21 + 18

Combine like terms: -21 + 18 = -3
-3u = -3

Divide each side by '-3'.
u = 1

Simplifying
u = 1

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