1a+6a-9=30

Solution for 1a+6a-9=30 equation:

Simplifying
1a + 6a + -9 = 30

Reorder the terms:
-9 + 1a + 6a = 30

Combine like terms: 1a + 6a = 7a
-9 + 7a = 30

Solving
-9 + 7a = 30

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 + 7a = 30 + 9

Combine like terms: -9 + 9 = 0
0 + 7a = 30 + 9
7a = 30 + 9

Combine like terms: 30 + 9 = 39
7a = 39

Divide each side by '7'.
a = 5.571428571

Simplifying
a = 5.571428571