-9-10x=10x+21

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


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

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

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

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

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

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

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

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

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

Simplifying
x = -1.5

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