7x-3=4*21

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Solution for 7x-3=4*21 equation: 


Simplifying
7x + -3 = 4 * 21

Reorder the terms:
-3 + 7x = 4 * 21

Multiply 4 * 21
-3 + 7x = 84

Solving
-3 + 7x = 84

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 = 84 + 3

Combine like terms: -3 + 3 = 0
0 + 7x = 84 + 3
7x = 84 + 3

Combine like terms: 84 + 3 = 87
7x = 87

Divide each side by '7'.
x = 12.42857143

Simplifying
x = 12.42857143

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