7a+3(a-9)=3

Solution for 7a+3(a-9)=3 equation:

Simplifying
7a + 3(a + -9) = 3

Reorder the terms:
7a + 3(-9 + a) = 3
7a + (-9 * 3 + a * 3) = 3
7a + (-27 + 3a) = 3

Reorder the terms:
-27 + 7a + 3a = 3

Combine like terms: 7a + 3a = 10a
-27 + 10a = 3

Solving
-27 + 10a = 3

Solving for variable 'a'.

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

Add '27' to each side of the equation.
-27 + 27 + 10a = 3 + 27

Combine like terms: -27 + 27 = 0
0 + 10a = 3 + 27
10a = 3 + 27

Combine like terms: 3 + 27 = 30
10a = 30

Divide each side by '10'.
a = 3

Simplifying
a = 3