(9x-15)-(4x+8)=12

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Solution for (9x-15)-(4x+8)=12 equation:


Simplifying
(9x + -15) + -1(4x + 8) = 12

Reorder the terms:
(-15 + 9x) + -1(4x + 8) = 12

Remove parenthesis around (-15 + 9x)
-15 + 9x + -1(4x + 8) = 12

Reorder the terms:
-15 + 9x + -1(8 + 4x) = 12
-15 + 9x + (8 * -1 + 4x * -1) = 12
-15 + 9x + (-8 + -4x) = 12

Reorder the terms:
-15 + -8 + 9x + -4x = 12

Combine like terms: -15 + -8 = -23
-23 + 9x + -4x = 12

Combine like terms: 9x + -4x = 5x
-23 + 5x = 12

Solving
-23 + 5x = 12

Solving for variable 'x'.

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

Add '23' to each side of the equation.
-23 + 23 + 5x = 12 + 23

Combine like terms: -23 + 23 = 0
0 + 5x = 12 + 23
5x = 12 + 23

Combine like terms: 12 + 23 = 35
5x = 35

Divide each side by '5'.
x = 7

Simplifying
x = 7

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