4*20=x

Solution for 4*20=x equation:

Simplifying
4 * 20 = x

Multiply 4 * 20
80 = x

Solving
80 = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
80 + -1x = x + -1x

Combine like terms: x + -1x = 0
80 + -1x = 0

Add '-80' to each side of the equation.
80 + -80 + -1x = 0 + -80

Combine like terms: 80 + -80 = 0
0 + -1x = 0 + -80
-1x = 0 + -80

Combine like terms: 0 + -80 = -80
-1x = -80

Divide each side by '-1'.
x = 80

Simplifying
x = 80