9x-3(2x+7)=81

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Solution for 9x-3(2x+7)=81 equation:


Simplifying
9x + -3(2x + 7) = 81

Reorder the terms:
9x + -3(7 + 2x) = 81
9x + (7 * -3 + 2x * -3) = 81
9x + (-21 + -6x) = 81

Reorder the terms:
-21 + 9x + -6x = 81

Combine like terms: 9x + -6x = 3x
-21 + 3x = 81

Solving
-21 + 3x = 81

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 + 3x = 81 + 21

Combine like terms: -21 + 21 = 0
0 + 3x = 81 + 21
3x = 81 + 21

Combine like terms: 81 + 21 = 102
3x = 102

Divide each side by '3'.
x = 34

Simplifying
x = 34

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