5x+4x-7=20

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Solution for 5x+4x-7=20 equation: 


Simplifying
5x + 4x + -7 = 20

Reorder the terms:
-7 + 5x + 4x = 20

Combine like terms: 5x + 4x = 9x
-7 + 9x = 20

Solving
-7 + 9x = 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 + 9x = 20 + 7

Combine like terms: -7 + 7 = 0
0 + 9x = 20 + 7
9x = 20 + 7

Combine like terms: 20 + 7 = 27
9x = 27

Divide each side by '9'.
x = 3

Simplifying
x = 3

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