Rewrite the equation as .

Multiply both sides of the equation by .

Remove parentheses.

Simplify each term.

Apply the distributive property.

Multiply by .

Add and .

Add and .

Multiply by .

Subtract from both sides of the equation.

Subtract from .

Divide each term in by .

Cancel the common factor of .

Cancel the common factor.

Divide by .

Divide by .

Solve for d 4.75=(21*(d+2.25)+67*d)/(21+67)