-5x+21-4x=20

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Solution for -5x+21-4x=20 equation: 


Simplifying
-5x + 21 + -4x = 20

Reorder the terms:
21 + -5x + -4x = 20

Combine like terms: -5x + -4x = -9x
21 + -9x = 20

Solving
21 + -9x = 20

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + -9x = 20 + -21

Combine like terms: 21 + -21 = 0
0 + -9x = 20 + -21
-9x = 20 + -21

Combine like terms: 20 + -21 = -1
-9x = -1

Divide each side by '-9'.
x = 0.1111111111

Simplifying
x = 0.1111111111

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