21=3-21x

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Solution for 21=3-21x equation:


Simplifying
21 = 3 + -21x

Solving
21 = 3 + -21x

Solving for variable 'x'.

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

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

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

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

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

Combine like terms: 3 + -21 = -18
21x = -18

Divide each side by '21'.
x = -0.8571428571

Simplifying
x = -0.8571428571

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