I added 10 to 3 times a number, the result is equal to 4 times the number. What is the number
The formula p=9d+320 is the cost of buying articles P while D is the number of articles
This is not completely accurate. The formula represents the cost of buying "d" number of articles at a fixed cost of $9 per article, plus an additional $320. "p" represents the total cost of purchasing the "d" number of articles.
So, if you want to find out how much it would cost to buy 20 articles, you would plug "20" in for "d":
p = 9(20) + 320
p = 180 + 320
p = 500
Therefore, buying 20 articles would cost $500.
To solve this problem, let's break it down step by step:
Step 1: Assign a variable to the unknown number.
Let's call the unknown number "x".
Step 2: Translate the given information into an equation.
"I added 10 to 3 times a number" can be written as "3x + 10".
"the result is equal to 4 times the number" can be written as "3x + 10 = 4x".
Step 3: Solve the equation for the unknown variable.
To isolate the variable on one side, we need to get rid of the constant term on the other side. In this case, subtracting 3x from both sides gives us:
3x + 10 - 3x = 4x - 3x
10 = x
Therefore, the number is 10.
Let's call the number "x":
3x + 10 = 4x
Subtracting 3x from both sides:
10 = x
Therefore, the number is 10.