21-3(4x-5)=9x-57

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Solution for 21-3(4x-5)=9x-57 equation: 


Simplifying
21 + -3(4x + -5) = 9x + -57

Reorder the terms:
21 + -3(-5 + 4x) = 9x + -57
21 + (-5 * -3 + 4x * -3) = 9x + -57
21 + (15 + -12x) = 9x + -57

Combine like terms: 21 + 15 = 36
36 + -12x = 9x + -57

Reorder the terms:
36 + -12x = -57 + 9x

Solving
36 + -12x = -57 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
36 + -12x + -9x = -57 + 9x + -9x

Combine like terms: -12x + -9x = -21x
36 + -21x = -57 + 9x + -9x

Combine like terms: 9x + -9x = 0
36 + -21x = -57 + 0
36 + -21x = -57

Add '-36' to each side of the equation.
36 + -36 + -21x = -57 + -36

Combine like terms: 36 + -36 = 0
0 + -21x = -57 + -36
-21x = -57 + -36

Combine like terms: -57 + -36 = -93
-21x = -93

Divide each side by '-21'.
x = 4.428571429

Simplifying
x = 4.428571429

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