a+b+c+d=12

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Solution for a+b+c+d=12 equation:


Simplifying
a + b + c + d = 12

Solving
a + b + c + d = 12

Solving for variable 'a'.

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

Add '-1b' to each side of the equation.
a + b + c + -1b + d = 12 + -1b

Reorder the terms:
a + b + -1b + c + d = 12 + -1b

Combine like terms: b + -1b = 0
a + 0 + c + d = 12 + -1b
a + c + d = 12 + -1b

Add '-1c' to each side of the equation.
a + c + -1c + d = 12 + -1b + -1c

Combine like terms: c + -1c = 0
a + 0 + d = 12 + -1b + -1c
a + d = 12 + -1b + -1c

Add '-1d' to each side of the equation.
a + d + -1d = 12 + -1b + -1c + -1d

Combine like terms: d + -1d = 0
a + 0 = 12 + -1b + -1c + -1d
a = 12 + -1b + -1c + -1d

Simplifying
a = 12 + -1b + -1c + -1d

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