3(21-2x)=39

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Solution for 3(21-2x)=39 equation: 


Simplifying
3(21 + -2x) = 39
(21 * 3 + -2x * 3) = 39
(63 + -6x) = 39

Solving
63 + -6x = 39

Solving for variable 'x'.

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

Add '-63' to each side of the equation.
63 + -63 + -6x = 39 + -63

Combine like terms: 63 + -63 = 0
0 + -6x = 39 + -63
-6x = 39 + -63

Combine like terms: 39 + -63 = -24
-6x = -24

Divide each side by '-6'.
x = 4

Simplifying
x = 4

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