231=7(3x+9)

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Solution for 231=7(3x+9) equation:


Simplifying
231 = 7(3x + 9)

Reorder the terms:
231 = 7(9 + 3x)
231 = (9 * 7 + 3x * 7)
231 = (63 + 21x)

Solving
231 = 63 + 21x

Solving for variable 'x'.

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

Add '-21x' to each side of the equation.
231 + -21x = 63 + 21x + -21x

Combine like terms: 21x + -21x = 0
231 + -21x = 63 + 0
231 + -21x = 63

Add '-231' to each side of the equation.
231 + -231 + -21x = 63 + -231

Combine like terms: 231 + -231 = 0
0 + -21x = 63 + -231
-21x = 63 + -231

Combine like terms: 63 + -231 = -168
-21x = -168

Divide each side by '-21'.
x = 8

Simplifying
x = 8

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