42=7a

Solution for 42=7a equation:

Simplifying
42 = 7a

Solving
42 = 7a

Solving for variable 'a'.

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

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

Combine like terms: 7a + -7a = 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