3x+7=-21

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Solution for 3x+7=-21 equation: 


Simplifying
3x + 7 = -21

Reorder the terms:
7 + 3x = -21

Solving
7 + 3x = -21

Solving for variable 'x'.

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

Add '-7' to each side of the equation.
7 + -7 + 3x = -21 + -7

Combine like terms: 7 + -7 = 0
0 + 3x = -21 + -7
3x = -21 + -7

Combine like terms: -21 + -7 = -28
3x = -28

Divide each side by '3'.
x = -9.333333333

Simplifying
x = -9.333333333

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