-3(5u-7)+3u=3(u+9)

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Solution for -3(5u-7)+3u=3(u+9) equation:


Simplifying
-3(5u + -7) + 3u = 3(u + 9)

Reorder the terms:
-3(-7 + 5u) + 3u = 3(u + 9)
(-7 * -3 + 5u * -3) + 3u = 3(u + 9)
(21 + -15u) + 3u = 3(u + 9)

Combine like terms: -15u + 3u = -12u
21 + -12u = 3(u + 9)

Reorder the terms:
21 + -12u = 3(9 + u)
21 + -12u = (9 * 3 + u * 3)
21 + -12u = (27 + 3u)

Solving
21 + -12u = 27 + 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 + -12u + -3u = 27 + 3u + -3u

Combine like terms: -12u + -3u = -15u
21 + -15u = 27 + 3u + -3u

Combine like terms: 3u + -3u = 0
21 + -15u = 27 + 0
21 + -15u = 27

Add '-21' to each side of the equation.
21 + -21 + -15u = 27 + -21

Combine like terms: 21 + -21 = 0
0 + -15u = 27 + -21
-15u = 27 + -21

Combine like terms: 27 + -21 = 6
-15u = 6

Divide each side by '-15'.
u = -0.4

Simplifying
u = -0.4

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