(20)(26)=(x)(x+x)

Solution for (20)(26)=(x)(x+x) equation:

Simplifying
(20)(26) = (x)(x + x)

Multiply 20 * 26
520 = (x)(x + x)

Combine like terms: x + x = 2x
520 = x(2x)

Remove parenthesis around (2x)
520 = x * 2x

Reorder the terms for easier multiplication:
520 = 2x * x

Multiply x * x
520 = 2x2

Solving
520 = 2x2

Solving for variable 'x'.

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

Add '-2x2' to each side of the equation.
520 + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
520 + -2x2 = 0

Add '-520' to each side of the equation.
520 + -520 + -2x2 = 0 + -520

Combine like terms: 520 + -520 = 0
0 + -2x2 = 0 + -520
-2x2 = 0 + -520

Combine like terms: 0 + -520 = -520
-2x2 = -520

Divide each side by '-2'.
x2 = 260

Simplifying
x2 = 260

Take the square root of each side:
x = {-16.124515497, 16.124515497}