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 = 66
-27x = 66

Divide each side by '-27'.
x = -2.444444444

Simplifying
x = -2.444444444

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