IF A IS ADDED TO THRICE OF A NUMBER GIVES 45 THEN THE NUMBER IS.

3x+A=45

x = (45-A)/3

Is there something else you want to specify?

muta is on the top of 500m cliff looking down at boat. what is the angle of depression of the boat from the top of cliff?

42°

To find the number, let's follow a step-by-step process:

Step 1: Assign a variable to the unknown number.
Let's say the unknown number is "x". So, we have "A + 3x = 45".

Step 2: Solve the equation.
To find the value of "x", we need to isolate it on one side of the equation. Let's do that.
Subtract "A" from both sides: "A + 3x - A = 45 - A".
This simplifies to: "3x = 45 - A".

Step 3: Further simplify the equation.
Since "A" is a constant, we can treat it as a number. So, "45 - A" is also a constant. Let's assign it a new constant "C" for simplicity.
Therefore, "3x = C".

Step 4: Solve for "x".
Divide both sides by 3 to solve for "x":
"x = C/3".

So, the number "x" is equal to "C/3".

In summary:
If "A" is added to thrice (3 times) a number, and the sum is 45, then the number is "C/3", where "C" is equal to "45 - A".