-6+4(u+3)=20

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Solution for -6+4(u+3)=20 equation: 


Simplifying
-6 + 4(u + 3) = 20

Reorder the terms:
-6 + 4(3 + u) = 20
-6 + (3 * 4 + u * 4) = 20
-6 + (12 + 4u) = 20

Combine like terms: -6 + 12 = 6
6 + 4u = 20

Solving
6 + 4u = 20

Solving for variable 'u'.

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

Add '-6' to each side of the equation.
6 + -6 + 4u = 20 + -6

Combine like terms: 6 + -6 = 0
0 + 4u = 20 + -6
4u = 20 + -6

Combine like terms: 20 + -6 = 14
4u = 14

Divide each side by '4'.
u = 3.5

Simplifying
u = 3.5

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