-7x-4=21

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Solution for -7x-4=21 equation: 


Simplifying
-7x + -4 = 21

Reorder the terms:
-4 + -7x = 21

Solving
-4 + -7x = 21

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + -7x = 21 + 4

Combine like terms: -4 + 4 = 0
0 + -7x = 21 + 4
-7x = 21 + 4

Combine like terms: 21 + 4 = 25
-7x = 25

Divide each side by '-7'.
x = -3.571428571

Simplifying
x = -3.571428571

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