(x+3)(10+20)=

Solution for (x+3)(10+20)= equation:

Simplifying
(x + 3)(10 + 20) = 0

Reorder the terms:
(3 + x)(10 + 20) = 0

Combine like terms: 10 + 20 = 30
(3 + x)(30) = 0

Reorder the terms for easier multiplication:
30(3 + x) = 0
(3 * 30 + x * 30) = 0
(90 + 30x) = 0

Solving
90 + 30x = 0

Solving for variable 'x'.

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

Add '-90' to each side of the equation.
90 + -90 + 30x = 0 + -90

Combine like terms: 90 + -90 = 0
0 + 30x = 0 + -90
30x = 0 + -90

Combine like terms: 0 + -90 = -90
30x = -90

Divide each side by '30'.
x = -3

Simplifying
x = -3