7x-5=21

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Solution for 7x-5=21 equation: 


Simplifying
7x + -5 = 21

Reorder the terms:
-5 + 7x = 21

Solving
-5 + 7x = 21

Solving for variable 'x'.

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

Add '5' to each side of the equation.
-5 + 5 + 7x = 21 + 5

Combine like terms: -5 + 5 = 0
0 + 7x = 21 + 5
7x = 21 + 5

Combine like terms: 21 + 5 = 26
7x = 26

Divide each side by '7'.
x = 3.714285714

Simplifying
x = 3.714285714

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