2a-b=-15

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Solution for 2a-b=-15 equation: 


Simplifying
2a + -1b = -15

Solving
2a + -1b = -15

Solving for variable 'a'.

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

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

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

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

Simplifying
a = -7.5 + 0.5b

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