-9=-7u+4(u-3)

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Solution for -9=-7u+4(u-3) equation:


Simplifying
-9 = -7u + 4(u + -3)

Reorder the terms:
-9 = -7u + 4(-3 + u)
-9 = -7u + (-3 * 4 + u * 4)
-9 = -7u + (-12 + 4u)

Reorder the terms:
-9 = -12 + -7u + 4u

Combine like terms: -7u + 4u = -3u
-9 = -12 + -3u

Solving
-9 = -12 + -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.
-9 + 3u = -12 + -3u + 3u

Combine like terms: -3u + 3u = 0
-9 + 3u = -12 + 0
-9 + 3u = -12

Add '9' to each side of the equation.
-9 + 9 + 3u = -12 + 9

Combine like terms: -9 + 9 = 0
0 + 3u = -12 + 9
3u = -12 + 9

Combine like terms: -12 + 9 = -3
3u = -3

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

Simplifying
u = -1

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