a+3b-c=20

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Solution for a+3b-c=20 equation:


Simplifying
a + 3b + -1c = 20

Solving
a + 3b + -1c = 20

Solving for variable 'a'.

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

Add '-3b' to each side of the equation.
a + 3b + -3b + -1c = 20 + -3b

Combine like terms: 3b + -3b = 0
a + 0 + -1c = 20 + -3b
a + -1c = 20 + -3b

Add 'c' to each side of the equation.
a + -1c + c = 20 + -3b + c

Combine like terms: -1c + c = 0
a + 0 = 20 + -3b + c
a = 20 + -3b + c

Simplifying
a = 20 + -3b + c

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