9=(1+2)*(2+x)

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Solution for 9=(1+2)*(2+x) equation:


Simplifying
9 = (1 + 2)(2 + x)

Combine like terms: 1 + 2 = 3
9 = (3)(2 + x)
9 = (2 * 3 + x * 3)
9 = (6 + 3x)

Solving
9 = 6 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
9 + -3x = 6 + 3x + -3x

Combine like terms: 3x + -3x = 0
9 + -3x = 6 + 0
9 + -3x = 6

Add '-9' to each side of the equation.
9 + -9 + -3x = 6 + -9

Combine like terms: 9 + -9 = 0
0 + -3x = 6 + -9
-3x = 6 + -9

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

Divide each side by '-3'.
x = 1

Simplifying
x = 1

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