7(u-3)=-3u+9

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Solution for 7(u-3)=-3u+9 equation:


Simplifying
7(u + -3) = -3u + 9

Reorder the terms:
7(-3 + u) = -3u + 9
(-3 * 7 + u * 7) = -3u + 9
(-21 + 7u) = -3u + 9

Reorder the terms:
-21 + 7u = 9 + -3u

Solving
-21 + 7u = 9 + -3u

Solving for variable 'u'.

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

Add '3u' to each side of the equation.
-21 + 7u + 3u = 9 + -3u + 3u

Combine like terms: 7u + 3u = 10u
-21 + 10u = 9 + -3u + 3u

Combine like terms: -3u + 3u = 0
-21 + 10u = 9 + 0
-21 + 10u = 9

Add '21' to each side of the equation.
-21 + 21 + 10u = 9 + 21

Combine like terms: -21 + 21 = 0
0 + 10u = 9 + 21
10u = 9 + 21

Combine like terms: 9 + 21 = 30
10u = 30

Divide each side by '10'.
u = 3

Simplifying
u = 3

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