21-5x+(-4x)=39

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Solution for 21-5x+(-4x)=39 equation: 


Simplifying
21 + -5x + (-4x) = 39

Combine like terms: -5x + (-4x) = -9x
21 + -9x = 39

Solving
21 + -9x = 39

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 = 39 + -21

Combine like terms: 21 + -21 = 0
0 + -9x = 39 + -21
-9x = 39 + -21

Combine like terms: 39 + -21 = 18
-9x = 18

Divide each side by '-9'.
x = -2

Simplifying
x = -2

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