4a-b=-18

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Solution for 4a-b=-18 equation: 


Simplifying
4a + -1b = -18

Solving
4a + -1b = -18

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.
4a + -1b + b = -18 + b

Combine like terms: -1b + b = 0
4a + 0 = -18 + b
4a = -18 + b

Divide each side by '4'.
a = -4.5 + 0.25b

Simplifying
a = -4.5 + 0.25b

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