7u+2(u-3)=30

Solution for 7u+2(u-3)=30 equation:

Simplifying
7u + 2(u + -3) = 30

Reorder the terms:
7u + 2(-3 + u) = 30
7u + (-3 * 2 + u * 2) = 30
7u + (-6 + 2u) = 30

Reorder the terms:
-6 + 7u + 2u = 30

Combine like terms: 7u + 2u = 9u
-6 + 9u = 30

Solving
-6 + 9u = 30

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 + 9u = 30 + 6

Combine like terms: -6 + 6 = 0
0 + 9u = 30 + 6
9u = 30 + 6

Combine like terms: 30 + 6 = 36
9u = 36

Divide each side by '9'.
u = 4

Simplifying
u = 4