-3+7x=21

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Solution for -3+7x=21 equation: 


Simplifying
-3 + 7x = 21

Solving
-3 + 7x = 21

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + 7x = 21 + 3

Combine like terms: -3 + 3 = 0
0 + 7x = 21 + 3
7x = 21 + 3

Combine like terms: 21 + 3 = 24
7x = 24

Divide each side by '7'.
x = 3.428571429

Simplifying
x = 3.428571429

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