-7+x+2x=20

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Solution for -7+x+2x=20 equation: 


Simplifying
-7 + x + 2x = 20

Combine like terms: x + 2x = 3x
-7 + 3x = 20

Solving
-7 + 3x = 20

Solving for variable 'x'.

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

Add '7' to each side of the equation.
-7 + 7 + 3x = 20 + 7

Combine like terms: -7 + 7 = 0
0 + 3x = 20 + 7
3x = 20 + 7

Combine like terms: 20 + 7 = 27
3x = 27

Divide each side by '3'.
x = 9

Simplifying
x = 9

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