Isolate variable d: First, we want to isolate the variable d on one side of the equation. To do this, we can start by adding 1 to both sides of the equation to cancel out the −1 on the left side.3d−1+1=1+1
Add 1 to both sides: Now, we simplify both sides of the equation.3d=2
Simplify the equation: To solve for d, we need to get rid of the division by 3. We can do this by multiplying both sides of the equation by 3.(3d)×3=2×3
Multiply by 3: After multiplying, we simplify the equation to find the value of d.d=6
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