(15+x)+x+(4x-20)=775

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Solution for (15+x)+x+(4x-20)=775 equation:


Simplifying
(15 + x) + x + (4x + -20) = 775

Remove parenthesis around (15 + x)
15 + x + x + (4x + -20) = 775

Reorder the terms:
15 + x + x + (-20 + 4x) = 775

Remove parenthesis around (-20 + 4x)
15 + x + x + -20 + 4x = 775

Reorder the terms:
15 + -20 + x + x + 4x = 775

Combine like terms: 15 + -20 = -5
-5 + x + x + 4x = 775

Combine like terms: x + x = 2x
-5 + 2x + 4x = 775

Combine like terms: 2x + 4x = 6x
-5 + 6x = 775

Solving
-5 + 6x = 775

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + 6x = 775 + 5

Combine like terms: -5 + 5 = 0
0 + 6x = 775 + 5
6x = 775 + 5

Combine like terms: 775 + 5 = 780
6x = 780

Divide each side by '6'.
x = 130

Simplifying
x = 130

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