-21-10x=10x+9

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Solution for -21-10x=10x+9 equation:


Simplifying
-21 + -10x = 10x + 9

Reorder the terms:
-21 + -10x = 9 + 10x

Solving
-21 + -10x = 9 + 10x

Solving for variable 'x'.

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

Add '-10x' to each side of the equation.
-21 + -10x + -10x = 9 + 10x + -10x

Combine like terms: -10x + -10x = -20x
-21 + -20x = 9 + 10x + -10x

Combine like terms: 10x + -10x = 0
-21 + -20x = 9 + 0
-21 + -20x = 9

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

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

Combine like terms: 9 + 21 = 30
-20x = 30

Divide each side by '-20'.
x = -1.5

Simplifying
x = -1.5

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