4a-9=7d+12

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Solution for 4a-9=7d+12 equation:


Simplifying
4a + -9 = 7d + 12

Reorder the terms:
-9 + 4a = 7d + 12

Reorder the terms:
-9 + 4a = 12 + 7d

Solving
-9 + 4a = 12 + 7d

Solving for variable 'a'.

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

Add '9' to each side of the equation.
-9 + 9 + 4a = 12 + 9 + 7d

Combine like terms: -9 + 9 = 0
0 + 4a = 12 + 9 + 7d
4a = 12 + 9 + 7d

Combine like terms: 12 + 9 = 21
4a = 21 + 7d

Divide each side by '4'.
a = 5.25 + 1.75d

Simplifying
a = 5.25 + 1.75d

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