4x+2x-1=20

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Solution for 4x+2x-1=20 equation: 


Simplifying
4x + 2x + -1 = 20

Reorder the terms:
-1 + 4x + 2x = 20

Combine like terms: 4x + 2x = 6x
-1 + 6x = 20

Solving
-1 + 6x = 20

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 6x = 20 + 1

Combine like terms: -1 + 1 = 0
0 + 6x = 20 + 1
6x = 20 + 1

Combine like terms: 20 + 1 = 21
6x = 21

Divide each side by '6'.
x = 3.5

Simplifying
x = 3.5

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