-9[-5-3x]=21

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Solution for -9[-5-3x]=21 equation: 


Simplifying
-9[-5 + -3x] = 21
[-5 * -9 + -3x * -9] = 21
[45 + 27x] = 21

Solving
45 + 27x = 21

Solving for variable 'x'.

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

Add '-45' to each side of the equation.
45 + -45 + 27x = 21 + -45

Combine like terms: 45 + -45 = 0
0 + 27x = 21 + -45
27x = 21 + -45

Combine like terms: 21 + -45 = -24
27x = -24

Divide each side by '27'.
x = -0.8888888889

Simplifying
x = -0.8888888889

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