Solve for j D=(j+w)/2

$D = \frac{j + w}{2}$

Rewrite the equation as $\frac{j + w}{2} = D$ .

$\frac{j + w}{2} = D$

Multiply both sides of the equation by $2$ .

$2 \frac{j + w}{2} = 2 D$

Simplify the left side.

Cancel the common factor of $2$ .

Cancel the common factor.

$2 \frac{j + w}{2} = 2 D$

Rewrite the expression.

$j + w = 2 D$

$j + w = 2 D$

$j + w = 2 D$

Subtract $w$ from both sides of the equation.

$j = 2 D - w$

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