(x-4)-(x+7)=8x

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Solution for (x-4)-(x+7)=8x equation:


Simplifying
(x + -4) + -1(x + 7) = 8x

Reorder the terms:
(-4 + x) + -1(x + 7) = 8x

Remove parenthesis around (-4 + x)
-4 + x + -1(x + 7) = 8x

Reorder the terms:
-4 + x + -1(7 + x) = 8x
-4 + x + (7 * -1 + x * -1) = 8x
-4 + x + (-7 + -1x) = 8x

Reorder the terms:
-4 + -7 + x + -1x = 8x

Combine like terms: -4 + -7 = -11
-11 + x + -1x = 8x

Combine like terms: x + -1x = 0
-11 + 0 = 8x
-11 = 8x

Solving
-11 = 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
-11 + -8x = 8x + -8x

Combine like terms: 8x + -8x = 0
-11 + -8x = 0

Add '11' to each side of the equation.
-11 + 11 + -8x = 0 + 11

Combine like terms: -11 + 11 = 0
0 + -8x = 0 + 11
-8x = 0 + 11

Combine like terms: 0 + 11 = 11
-8x = 11

Divide each side by '-8'.
x = -1.375

Simplifying
x = -1.375

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