3x+(x-8)=20

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Solution for 3x+(x-8)=20 equation:


Simplifying
3x + (x + -8) = 20

Reorder the terms:
3x + (-8 + x) = 20

Remove parenthesis around (-8 + x)
3x + -8 + x = 20

Reorder the terms:
-8 + 3x + x = 20

Combine like terms: 3x + x = 4x
-8 + 4x = 20

Solving
-8 + 4x = 20

Solving for variable 'x'.

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

Add '8' to each side of the equation.
-8 + 8 + 4x = 20 + 8

Combine like terms: -8 + 8 = 0
0 + 4x = 20 + 8
4x = 20 + 8

Combine like terms: 20 + 8 = 28
4x = 28

Divide each side by '4'.
x = 7

Simplifying
x = 7

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