X-3(x-7)=9

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


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

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

Reorder the terms:
21 + X + -3x = 9

Solving
21 + X + -3x = 9

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 + X + -21 + -3x = 9 + -21

Reorder the terms:
21 + -21 + X + -3x = 9 + -21

Combine like terms: 21 + -21 = 0
0 + X + -3x = 9 + -21
X + -3x = 9 + -21

Combine like terms: 9 + -21 = -12
X + -3x = -12

Add '3x' to each side of the equation.
X + -3x + 3x = -12 + 3x

Combine like terms: -3x + 3x = 0
X + 0 = -12 + 3x
X = -12 + 3x

Simplifying
X = -12 + 3x

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