3(7-7x)=105

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Solution for 3(7-7x)=105 equation: 


Simplifying
3(7 + -7x) = 105
(7 * 3 + -7x * 3) = 105
(21 + -21x) = 105

Solving
21 + -21x = 105

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + -21x = 105 + -21

Combine like terms: 21 + -21 = 0
0 + -21x = 105 + -21
-21x = 105 + -21

Combine like terms: 105 + -21 = 84
-21x = 84

Divide each side by '-21'.
x = -4

Simplifying
x = -4

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