x+x+(x+20)+(x+20)=300

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


Simplifying
x + x + (x + 20) + (x + 20) = 300

Reorder the terms:
x + x + (20 + x) + (x + 20) = 300

Remove parenthesis around (20 + x)
x + x + 20 + x + (x + 20) = 300

Reorder the terms:
x + x + 20 + x + (20 + x) = 300

Remove parenthesis around (20 + x)
x + x + 20 + x + 20 + x = 300

Reorder the terms:
20 + 20 + x + x + x + x = 300

Combine like terms: 20 + 20 = 40
40 + x + x + x + x = 300

Combine like terms: x + x = 2x
40 + 2x + x + x = 300

Combine like terms: 2x + x = 3x
40 + 3x + x = 300

Combine like terms: 3x + x = 4x
40 + 4x = 300

Solving
40 + 4x = 300

Solving for variable 'x'.

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

Add '-40' to each side of the equation.
40 + -40 + 4x = 300 + -40

Combine like terms: 40 + -40 = 0
0 + 4x = 300 + -40
4x = 300 + -40

Combine like terms: 300 + -40 = 260
4x = 260

Divide each side by '4'.
x = 65

Simplifying
x = 65

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