a+2d=18

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Solution for a+2d=18 equation: 


Simplifying
a + 2d = 18

Solving
a + 2d = 18

Solving for variable 'a'.

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

Add '-2d' to each side of the equation.
a + 2d + -2d = 18 + -2d

Combine like terms: 2d + -2d = 0
a + 0 = 18 + -2d
a = 18 + -2d

Simplifying
a = 18 + -2d

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