(a-12)(1-3)+15=1

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Solution for (a-12)(1-3)+15=1 equation:


Simplifying
(a + -12)(1 + -3) + 15 = 1

Reorder the terms:
(-12 + a)(1 + -3) + 15 = 1

Combine like terms: 1 + -3 = -2
(-12 + a)(-2) + 15 = 1

Reorder the terms for easier multiplication:
-2(-12 + a) + 15 = 1
(-12 * -2 + a * -2) + 15 = 1
(24 + -2a) + 15 = 1

Reorder the terms:
24 + 15 + -2a = 1

Combine like terms: 24 + 15 = 39
39 + -2a = 1

Solving
39 + -2a = 1

Solving for variable 'a'.

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

Add '-39' to each side of the equation.
39 + -39 + -2a = 1 + -39

Combine like terms: 39 + -39 = 0
0 + -2a = 1 + -39
-2a = 1 + -39

Combine like terms: 1 + -39 = -38
-2a = -38

Divide each side by '-2'.
a = 19

Simplifying
a = 19

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