(3a+b)-(a+b)=

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Solution for (3a+b)-(a+b)= equation:


Simplifying
(3a + b) + -1(a + b) = 0

Remove parenthesis around (3a + b)
3a + b + -1(a + b) = 0
3a + b + (a * -1 + b * -1) = 0
3a + b + (-1a + -1b) = 0

Reorder the terms:
3a + -1a + b + -1b = 0

Combine like terms: 3a + -1a = 2a
2a + b + -1b = 0

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

Solving
2a = 0

Solving for variable 'a'.

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

Divide each side by '2'.
a = 0

Simplifying
a = 0

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