10-d=19
What is d?
I think it is -9.
Right.
Thanks
You're welcome.
To find the value of d in the equation 10 - d = 19, you can solve for d by isolating it on one side of the equation. Here's how to do it:
Step 1: Start with the given equation: 10 - d = 19.
Step 2: To isolate d, you need to get rid of the 10 on the left side of the equation. You can do this by subtracting 10 from both sides of the equation:
10 - 10 - d = 19 - 10.
This simplifies to:
0 - d = 9.
Step 3: Now, to solve for d, you need to get rid of the coefficient -1 in front of d. You can do this by multiplying both sides of the equation by -1:
-1(0 - d) = -1(9).
This simplifies to:
0 -(-d) = -9.
-(-d) simplifies to d since the double negative cancels out.
So, you're left with:
0 - d = -9.
Step 4: Now, you have:
-d = -9.
Step 5: To solve for d, you can multiply both sides of the equation by -1 (or divide by -1) to get the value of d:
(-1)(-d) = (-1)(-9).
This simplifies to:
d = 9.
So, the value of d in the equation 10 - d = 19 is 9.