21x-3=90

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Solution for 21x-3=90 equation: 


Simplifying
21x + -3 = 90

Reorder the terms:
-3 + 21x = 90

Solving
-3 + 21x = 90

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 + 21x = 90 + 3

Combine like terms: -3 + 3 = 0
0 + 21x = 90 + 3
21x = 90 + 3

Combine like terms: 90 + 3 = 93
21x = 93

Divide each side by '21'.
x = 4.428571429

Simplifying
x = 4.428571429

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