(10+x)2=30

Solution for (10+x)2=30 equation:

Simplifying
(10 + x) * 2 = 30

Reorder the terms for easier multiplication:
2(10 + x) = 30
(10 * 2 + x * 2) = 30
(20 + 2x) = 30

Solving
20 + 2x = 30

Solving for variable 'x'.

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

Add '-20' to each side of the equation.
20 + -20 + 2x = 30 + -20

Combine like terms: 20 + -20 = 0
0 + 2x = 30 + -20
2x = 30 + -20

Combine like terms: 30 + -20 = 10
2x = 10

Divide each side by '2'.
x = 5

Simplifying
x = 5