4[x-8]-9=31

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Solution for 4[x-8]-9=31 equation:


Simplifying
4[x + -8] + -9 = 31

Reorder the terms:
4[-8 + x] + -9 = 31
[-8 * 4 + x * 4] + -9 = 31
[-32 + 4x] + -9 = 31

Reorder the terms:
-32 + -9 + 4x = 31

Combine like terms: -32 + -9 = -41
-41 + 4x = 31

Solving
-41 + 4x = 31

Solving for variable 'x'.

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

Add '41' to each side of the equation.
-41 + 41 + 4x = 31 + 41

Combine like terms: -41 + 41 = 0
0 + 4x = 31 + 41
4x = 31 + 41

Combine like terms: 31 + 41 = 72
4x = 72

Divide each side by '4'.
x = 18

Simplifying
x = 18

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