-[3x+(7x+4)]=9-(7x+9)

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Solution for -[3x+(7x+4)]=9-(7x+9) equation:


Simplifying
-1[3x + (7x + 4)] = 9 + -1(7x + 9)

Reorder the terms:
-1[3x + (4 + 7x)] = 9 + -1(7x + 9)

Remove parenthesis around (4 + 7x)
-1[3x + 4 + 7x] = 9 + -1(7x + 9)

Reorder the terms:
-1[4 + 3x + 7x] = 9 + -1(7x + 9)

Combine like terms: 3x + 7x = 10x
-1[4 + 10x] = 9 + -1(7x + 9)
[4 * -1 + 10x * -1] = 9 + -1(7x + 9)
[-4 + -10x] = 9 + -1(7x + 9)

Reorder the terms:
-4 + -10x = 9 + -1(9 + 7x)
-4 + -10x = 9 + (9 * -1 + 7x * -1)
-4 + -10x = 9 + (-9 + -7x)

Combine like terms: 9 + -9 = 0
-4 + -10x = 0 + -7x
-4 + -10x = -7x

Solving
-4 + -10x = -7x

Solving for variable 'x'.

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

Add '7x' to each side of the equation.
-4 + -10x + 7x = -7x + 7x

Combine like terms: -10x + 7x = -3x
-4 + -3x = -7x + 7x

Combine like terms: -7x + 7x = 0
-4 + -3x = 0

Add '4' to each side of the equation.
-4 + 4 + -3x = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -3x = 0 + 4
-3x = 0 + 4

Combine like terms: 0 + 4 = 4
-3x = 4

Divide each side by '-3'.
x = -1.333333333

Simplifying
x = -1.333333333

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