42*3=a

Solution for 42*3=a equation:

Simplifying
42 * 3 = a

Multiply 42 * 3
126 = a

Solving
126 = a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
126 + -1a = a + -1a

Combine like terms: a + -1a = 0
126 + -1a = 0

Add '-126' to each side of the equation.
126 + -126 + -1a = 0 + -126

Combine like terms: 126 + -126 = 0
0 + -1a = 0 + -126
-1a = 0 + -126

Combine like terms: 0 + -126 = -126
-1a = -126

Divide each side by '-1'.
a = 126

Simplifying
a = 126