7(3-4x)=21

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Solution for 7(3-4x)=21 equation: 


Simplifying
7(3 + -4x) = 21
(3 * 7 + -4x * 7) = 21
(21 + -28x) = 21

Add '-21' to each side of the equation.
21 + -21 + -28x = 21 + -21

Combine like terms: 21 + -21 = 0
0 + -28x = 21 + -21
-28x = 21 + -21

Combine like terms: 21 + -21 = 0
-28x = 0

Solving
-28x = 0

Solving for variable 'x'.

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

Divide each side by '-28'.
x = 0

Simplifying
x = 0

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