(x-8)-(x+9)=7x

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Solution for (x-8)-(x+9)=7x equation:


Simplifying
(x + -8) + -1(x + 9) = 7x

Reorder the terms:
(-8 + x) + -1(x + 9) = 7x

Remove parenthesis around (-8 + x)
-8 + x + -1(x + 9) = 7x

Reorder the terms:
-8 + x + -1(9 + x) = 7x
-8 + x + (9 * -1 + x * -1) = 7x
-8 + x + (-9 + -1x) = 7x

Reorder the terms:
-8 + -9 + x + -1x = 7x

Combine like terms: -8 + -9 = -17
-17 + x + -1x = 7x

Combine like terms: x + -1x = 0
-17 + 0 = 7x
-17 = 7x

Solving
-17 = 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.
-17 + -7x = 7x + -7x

Combine like terms: 7x + -7x = 0
-17 + -7x = 0

Add '17' to each side of the equation.
-17 + 17 + -7x = 0 + 17

Combine like terms: -17 + 17 = 0
0 + -7x = 0 + 17
-7x = 0 + 17

Combine like terms: 0 + 17 = 17
-7x = 17

Divide each side by '-7'.
x = -2.428571429

Simplifying
x = -2.428571429

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