21=3.5*x

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Solution for 21=3.5*x equation:


Simplifying
21 = 3.5x

Solving
21 = 3.5x

Solving for variable 'x'.

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

Add '-3.5x' to each side of the equation.
21 + -3.5x = 3.5x + -3.5x

Combine like terms: 3.5x + -3.5x = 0.0
21 + -3.5x = 0.0

Add '-21' to each side of the equation.
21 + -21 + -3.5x = 0.0 + -21

Combine like terms: 21 + -21 = 0
0 + -3.5x = 0.0 + -21
-3.5x = 0.0 + -21

Combine like terms: 0.0 + -21 = -21
-3.5x = -21

Divide each side by '-3.5'.
x = 6

Simplifying
x = 6

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