-5x-10=21

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Solution for -5x-10=21 equation: 


Simplifying
-5x + -10 = 21

Reorder the terms:
-10 + -5x = 21

Solving
-10 + -5x = 21

Solving for variable 'x'.

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

Add '10' to each side of the equation.
-10 + 10 + -5x = 21 + 10

Combine like terms: -10 + 10 = 0
0 + -5x = 21 + 10
-5x = 21 + 10

Combine like terms: 21 + 10 = 31
-5x = 31

Divide each side by '-5'.
x = -6.2

Simplifying
x = -6.2

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