3a+9d=7

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Solution for 3a+9d=7 equation: 


Simplifying
3a + 9d = 7

Solving
3a + 9d = 7

Solving for variable 'a'.

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

Add '-9d' to each side of the equation.
3a + 9d + -9d = 7 + -9d

Combine like terms: 9d + -9d = 0
3a + 0 = 7 + -9d
3a = 7 + -9d

Divide each side by '3'.
a = 2.333333333 + -3d

Simplifying
a = 2.333333333 + -3d

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