(3x-4)-(6x+7)=31

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Solution for (3x-4)-(6x+7)=31 equation:


Simplifying
(3x + -4) + -1(6x + 7) = 31

Reorder the terms:
(-4 + 3x) + -1(6x + 7) = 31

Remove parenthesis around (-4 + 3x)
-4 + 3x + -1(6x + 7) = 31

Reorder the terms:
-4 + 3x + -1(7 + 6x) = 31
-4 + 3x + (7 * -1 + 6x * -1) = 31
-4 + 3x + (-7 + -6x) = 31

Reorder the terms:
-4 + -7 + 3x + -6x = 31

Combine like terms: -4 + -7 = -11
-11 + 3x + -6x = 31

Combine like terms: 3x + -6x = -3x
-11 + -3x = 31

Solving
-11 + -3x = 31

Solving for variable 'x'.

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

Add '11' to each side of the equation.
-11 + 11 + -3x = 31 + 11

Combine like terms: -11 + 11 = 0
0 + -3x = 31 + 11
-3x = 31 + 11

Combine like terms: 31 + 11 = 42
-3x = 42

Divide each side by '-3'.
x = -14

Simplifying
x = -14

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