(400+20)(90-1x)=

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Solution for (400+20)(90-1x)= equation:


Simplifying
(400 + 20)(90 + -1x) = 0

Combine like terms: 400 + 20 = 420
(420)(90 + -1x) = 0
(90 * 420 + -1x * 420) = 0
(37800 + -420x) = 0

Solving
37800 + -420x = 0

Solving for variable 'x'.

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

Add '-37800' to each side of the equation.
37800 + -37800 + -420x = 0 + -37800

Combine like terms: 37800 + -37800 = 0
0 + -420x = 0 + -37800
-420x = 0 + -37800

Combine like terms: 0 + -37800 = -37800
-420x = -37800

Divide each side by '-420'.
x = 90

Simplifying
x = 90

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