0.21d-0.4=0.11d+1-0.6d

Since d is on the right side of the equation, switch the sides so it is on the left side of the equation.

0.11d+1-0.6d=0.21d-0.4

Subtract 0.6d from 0.11d.

-0.49d+1=0.21d-0.4

Subtract 0.21d from both sides of the equation.

-0.49d+1-0.21d=-0.4

Subtract 0.21d from -0.49d.

-0.7d+1=-0.4

-0.7d+1=-0.4

Subtract 1 from both sides of the equation.

-0.7d=-0.4-1

Subtract 1 from -0.4.

-0.7d=-1.4

-0.7d=-1.4

Divide each term in -0.7d=-1.4 by -0.7.

-0.7d-0.7=-1.4-0.7

Cancel the common factor of -0.7.

d=-1.4-0.7

Divide -1.4 by -0.7.

d=2

d=2

Solve for d 0.21d-0.4=0.11d+1-0.6d