0.4*15=d

Solution for 0.4*15=d equation:

Simplifying
0.4 * 15 = d

Multiply 0.4 * 15
6 = d

Solving
6 = d

Solving for variable 'd'.

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

Add '-1d' to each side of the equation.
6 + -1d = d + -1d

Combine like terms: d + -1d = 0
6 + -1d = 0

Add '-6' to each side of the equation.
6 + -6 + -1d = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -1d = 0 + -6
-1d = 0 + -6

Combine like terms: 0 + -6 = -6
-1d = -6

Divide each side by '-1'.
d = 6

Simplifying
d = 6