3a+b=a-15

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Solution for 3a+b=a-15 equation:


Simplifying
3a + b = a + -15

Reorder the terms:
3a + b = -15 + a

Solving
3a + b = -15 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
3a + -1a + b = -15 + a + -1a

Combine like terms: 3a + -1a = 2a
2a + b = -15 + a + -1a

Combine like terms: a + -1a = 0
2a + b = -15 + 0
2a + b = -15

Add '-1b' to each side of the equation.
2a + b + -1b = -15 + -1b

Combine like terms: b + -1b = 0
2a + 0 = -15 + -1b
2a = -15 + -1b

Divide each side by '2'.
a = -7.5 + -0.5b

Simplifying
a = -7.5 + -0.5b

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