7(3x+9)-9x=243

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Solution for 7(3x+9)-9x=243 equation:


Simplifying
7(3x + 9) + -9x = 243

Reorder the terms:
7(9 + 3x) + -9x = 243
(9 * 7 + 3x * 7) + -9x = 243
(63 + 21x) + -9x = 243

Combine like terms: 21x + -9x = 12x
63 + 12x = 243

Solving
63 + 12x = 243

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 + 12x = 243 + -63

Combine like terms: 63 + -63 = 0
0 + 12x = 243 + -63
12x = 243 + -63

Combine like terms: 243 + -63 = 180
12x = 180

Divide each side by '12'.
x = 15

Simplifying
x = 15

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