1-7x-1=-21

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Solution for 1-7x-1=-21 equation: 


Simplifying
1 + -7x + -1 = -21

Reorder the terms:
1 + -1 + -7x = -21

Combine like terms: 1 + -1 = 0
0 + -7x = -21
-7x = -21

Solving
-7x = -21

Solving for variable 'x'.

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

Divide each side by '-7'.
x = 3

Simplifying
x = 3

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