3x+21=-36

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Solution for 3x+21=-36 equation: 


Simplifying
3x + 21 = -36

Reorder the terms:
21 + 3x = -36

Solving
21 + 3x = -36

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 3x = -36 + -21

Combine like terms: 21 + -21 = 0
0 + 3x = -36 + -21
3x = -36 + -21

Combine like terms: -36 + -21 = -57
3x = -57

Divide each side by '3'.
x = -19

Simplifying
x = -19

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