-1-7x=20

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Solution for -1-7x=20 equation: 


Simplifying
-1 + -7x = 20

Solving
-1 + -7x = 20

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + -7x = 20 + 1

Combine like terms: -1 + 1 = 0
0 + -7x = 20 + 1
-7x = 20 + 1

Combine like terms: 20 + 1 = 21
-7x = 21

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

Simplifying
x = -3

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