7x-1=21

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Solution for 7x-1=21 equation: 


Simplifying
7x + -1 = 21

Reorder the terms:
-1 + 7x = 21

Solving
-1 + 7x = 21

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 = 21 + 1

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

Combine like terms: 21 + 1 = 22
7x = 22

Divide each side by '7'.
x = 3.142857143

Simplifying
x = 3.142857143

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