9=12+5x-(6x+7)

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Solution for 9=12+5x-(6x+7) equation:


Simplifying
9 = 12 + 5x + -1(6x + 7)

Reorder the terms:
9 = 12 + 5x + -1(7 + 6x)
9 = 12 + 5x + (7 * -1 + 6x * -1)
9 = 12 + 5x + (-7 + -6x)

Reorder the terms:
9 = 12 + -7 + 5x + -6x

Combine like terms: 12 + -7 = 5
9 = 5 + 5x + -6x

Combine like terms: 5x + -6x = -1x
9 = 5 + -1x

Solving
9 = 5 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
9 + x = 5 + -1x + x

Combine like terms: -1x + x = 0
9 + x = 5 + 0
9 + x = 5

Add '-9' to each side of the equation.
9 + -9 + x = 5 + -9

Combine like terms: 9 + -9 = 0
0 + x = 5 + -9
x = 5 + -9

Combine like terms: 5 + -9 = -4
x = -4

Simplifying
x = -4

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