300=20(4x+55)

Solution for 300=20(4x+55) equation:

Simplifying
300 = 20(4x + 55)

Reorder the terms:
300 = 20(55 + 4x)
300 = (55 * 20 + 4x * 20)
300 = (1100 + 80x)

Solving
300 = 1100 + 80x

Solving for variable 'x'.

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

Add '-80x' to each side of the equation.
300 + -80x = 1100 + 80x + -80x

Combine like terms: 80x + -80x = 0
300 + -80x = 1100 + 0
300 + -80x = 1100

Add '-300' to each side of the equation.
300 + -300 + -80x = 1100 + -300

Combine like terms: 300 + -300 = 0
0 + -80x = 1100 + -300
-80x = 1100 + -300

Combine like terms: 1100 + -300 = 800
-80x = 800

Divide each side by '-80'.
x = -10

Simplifying
x = -10