7(3x-9)=-21

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Solution for 7(3x-9)=-21 equation: 


Simplifying
7(3x + -9) = -21

Reorder the terms:
7(-9 + 3x) = -21
(-9 * 7 + 3x * 7) = -21
(-63 + 21x) = -21

Solving
-63 + 21x = -21

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 + 21x = -21 + 63

Combine like terms: -63 + 63 = 0
0 + 21x = -21 + 63
21x = -21 + 63

Combine like terms: -21 + 63 = 42
21x = 42

Divide each side by '21'.
x = 2

Simplifying
x = 2

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