7a-20=12d

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Solution for 7a-20=12d equation: 


Simplifying
7a + -20 = 12d

Reorder the terms:
-20 + 7a = 12d

Solving
-20 + 7a = 12d

Solving for variable 'a'.

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

Add '20' to each side of the equation.
-20 + 20 + 7a = 20 + 12d

Combine like terms: -20 + 20 = 0
0 + 7a = 20 + 12d
7a = 20 + 12d

Divide each side by '7'.
a = 2.857142857 + 1.714285714d

Simplifying
a = 2.857142857 + 1.714285714d

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