-2(u-9)=8u-42

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Solution for -2(u-9)=8u-42 equation:


Simplifying
-2(u + -9) = 8u + -42

Reorder the terms:
-2(-9 + u) = 8u + -42
(-9 * -2 + u * -2) = 8u + -42
(18 + -2u) = 8u + -42

Reorder the terms:
18 + -2u = -42 + 8u

Solving
18 + -2u = -42 + 8u

Solving for variable 'u'.

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

Add '-8u' to each side of the equation.
18 + -2u + -8u = -42 + 8u + -8u

Combine like terms: -2u + -8u = -10u
18 + -10u = -42 + 8u + -8u

Combine like terms: 8u + -8u = 0
18 + -10u = -42 + 0
18 + -10u = -42

Add '-18' to each side of the equation.
18 + -18 + -10u = -42 + -18

Combine like terms: 18 + -18 = 0
0 + -10u = -42 + -18
-10u = -42 + -18

Combine like terms: -42 + -18 = -60
-10u = -60

Divide each side by '-10'.
u = 6

Simplifying
u = 6

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