-2(u-9)=-6u+42

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Solution for -2(u-9)=-6u+42 equation:


Simplifying
-2(u + -9) = -6u + 42

Reorder the terms:
-2(-9 + u) = -6u + 42
(-9 * -2 + u * -2) = -6u + 42
(18 + -2u) = -6u + 42

Reorder the terms:
18 + -2u = 42 + -6u

Solving
18 + -2u = 42 + -6u

Solving for variable 'u'.

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

Add '6u' to each side of the equation.
18 + -2u + 6u = 42 + -6u + 6u

Combine like terms: -2u + 6u = 4u
18 + 4u = 42 + -6u + 6u

Combine like terms: -6u + 6u = 0
18 + 4u = 42 + 0
18 + 4u = 42

Add '-18' to each side of the equation.
18 + -18 + 4u = 42 + -18

Combine like terms: 18 + -18 = 0
0 + 4u = 42 + -18
4u = 42 + -18

Combine like terms: 42 + -18 = 24
4u = 24

Divide each side by '4'.
u = 6

Simplifying
u = 6

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