3x+4x-8=20

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Solution for 3x+4x-8=20 equation: 


Simplifying
3x + 4x + -8 = 20

Reorder the terms:
-8 + 3x + 4x = 20

Combine like terms: 3x + 4x = 7x
-8 + 7x = 20

Solving
-8 + 7x = 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 + 7x = 20 + 8

Combine like terms: -8 + 8 = 0
0 + 7x = 20 + 8
7x = 20 + 8

Combine like terms: 20 + 8 = 28
7x = 28

Divide each side by '7'.
x = 4

Simplifying
x = 4

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