4.2+2.5d=2.2d

Solution for 4.2+2.5d=2.2d equation:

Simplifying
4.2 + 2.5d = 2.2d

Solving
4.2 + 2.5d = 2.2d

Solving for variable 'd'.

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

Add '-2.2d' to each side of the equation.
4.2 + 2.5d + -2.2d = 2.2d + -2.2d

Combine like terms: 2.5d + -2.2d = 0.3d
4.2 + 0.3d = 2.2d + -2.2d

Combine like terms: 2.2d + -2.2d = 0.0
4.2 + 0.3d = 0.0

Add '-4.2' to each side of the equation.
4.2 + -4.2 + 0.3d = 0.0 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + 0.3d = 0.0 + -4.2
0.3d = 0.0 + -4.2

Combine like terms: 0.0 + -4.2 = -4.2
0.3d = -4.2

Divide each side by '0.3'.
d = -14

Simplifying
d = -14