Question

Solve for d.

3d + 1 = 10

Answer 1

D=3
3*3=9+1=10

Answer 2

You need to isolate "d" on the left side of your equation. To accomplish this, please subtract 1 from both sides of the equation. What do you get as a result?

Answer 3

You want d alone.
d is being multiplied by 3, and then 1 is being added to the product.
You need to undo both the addition and the multiplication.
If you knew what d is, you'd multiply d by 3, then you'd add 1.
To undo the operations, you do the opposite operations in the reverse order.

Start by subtracting 1 from both sides.
Then divide both sides by 3.