a+42=8a

Solution for a+42=8a equation:

Simplifying
a + 42 = 8a

Reorder the terms:
42 + a = 8a

Solving
42 + a = 8a

Solving for variable 'a'.

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

Add '-8a' to each side of the equation.
42 + a + -8a = 8a + -8a

Combine like terms: a + -8a = -7a
42 + -7a = 8a + -8a

Combine like terms: 8a + -8a = 0
42 + -7a = 0

Add '-42' to each side of the equation.
42 + -42 + -7a = 0 + -42

Combine like terms: 42 + -42 = 0
0 + -7a = 0 + -42
-7a = 0 + -42

Combine like terms: 0 + -42 = -42
-7a = -42

Divide each side by '-7'.
a = 6

Simplifying
a = 6