3x+9=9-(x+8)

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Solution for 3x+9=9-(x+8) equation:


Simplifying
3x + 9 = 9 + -1(x + 8)

Reorder the terms:
9 + 3x = 9 + -1(x + 8)

Reorder the terms:
9 + 3x = 9 + -1(8 + x)
9 + 3x = 9 + (8 * -1 + x * -1)
9 + 3x = 9 + (-8 + -1x)

Combine like terms: 9 + -8 = 1
9 + 3x = 1 + -1x

Solving
9 + 3x = 1 + -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 + 3x + x = 1 + -1x + x

Combine like terms: 3x + x = 4x
9 + 4x = 1 + -1x + x

Combine like terms: -1x + x = 0
9 + 4x = 1 + 0
9 + 4x = 1

Add '-9' to each side of the equation.
9 + -9 + 4x = 1 + -9

Combine like terms: 9 + -9 = 0
0 + 4x = 1 + -9
4x = 1 + -9

Combine like terms: 1 + -9 = -8
4x = -8

Divide each side by '4'.
x = -2

Simplifying
x = -2

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