3x+9=-(x+7)

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


Simplifying
3x + 9 = -1(x + 7)

Reorder the terms:
9 + 3x = -1(x + 7)

Reorder the terms:
9 + 3x = -1(7 + x)
9 + 3x = (7 * -1 + x * -1)
9 + 3x = (-7 + -1x)

Solving
9 + 3x = -7 + -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 = -7 + -1x + x

Combine like terms: 3x + x = 4x
9 + 4x = -7 + -1x + x

Combine like terms: -1x + x = 0
9 + 4x = -7 + 0
9 + 4x = -7

Add '-9' to each side of the equation.
9 + -9 + 4x = -7 + -9

Combine like terms: 9 + -9 = 0
0 + 4x = -7 + -9
4x = -7 + -9

Combine like terms: -7 + -9 = -16
4x = -16

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

Simplifying
x = -4

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