I am not good at math at all and my teacher has given me a very hard question about solving for the indicated variable. p=s+t+u solve for u Help please

Subtract s and t from both sides.

Sure! I can help you solve for the variable u in the equation p = s + t + u. To find the value of u, we need to isolate it on one side of the equation.

Let's start by rearranging the equation:
p = s + t + u

To isolate u, we'll start by moving the terms s and t to the other side of the equation:
p - s - t = u

Now, we have isolated u on one side of the equation. The expression p - s - t is equal to u. So, the solution to the equation is u = p - s - t.

To find the value of u, you will need to substitute the given values for p, s, and t into the equation. Once you have those values, you can simply calculate the right side of the equation to get the value of u.

For example, if p = 10, s = 3, and t = 2, you can substitute these values into the equation: u = 10 - 3 - 2 = 5.

Remember, the key to solving these types of problems is to isolate the variable you want to solve for by manipulating the equation using addition, subtraction, multiplication, and division to move terms to the other side of the equation.