84=.5*21x

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Solution for 84=.5*21x equation:


Simplifying
84 = 0.5 * 21x

Multiply 0.5 * 21
84 = 10.5x

Solving
84 = 10.5x

Solving for variable 'x'.

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

Add '-10.5x' to each side of the equation.
84 + -10.5x = 10.5x + -10.5x

Combine like terms: 10.5x + -10.5x = 0.0
84 + -10.5x = 0.0

Add '-84' to each side of the equation.
84 + -84 + -10.5x = 0.0 + -84

Combine like terms: 84 + -84 = 0
0 + -10.5x = 0.0 + -84
-10.5x = 0.0 + -84

Combine like terms: 0.0 + -84 = -84
-10.5x = -84

Divide each side by '-10.5'.
x = 8

Simplifying
x = 8

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