do not know how to get answer on kathleen spent $30.50 on two shirts. One shirt cost $3.50 more than the other. How much did each shirt cost?How do you get the answer for X +X+3.50 = 30.50. Trying to explain how to get answer to a 5th grader.
Two of us gave you lengthy explanations.
http://www.jiskha.com/display.cgi?id=1352951303
explanation for 5th grader without using variables ??
one shirt cost $3.50 more than the other
so if we reduced the cost of the the more expensive by $3.50, they would have cost the same.
But then we should reduce the total by 3.50
--- 30.50 - 3.50 = $27
since they now cost the same, we simply take half of 27 which is 13.5
check:
cheaper shirt -- 13.50
more expensive shirt --13.50+30.50 = 17
total cost = 13.50+17 = 30.50
To solve the equation X + X + 3.50 = 30.50, we can follow these steps:
Step 1: Start by simplifying the equation. Since we have two X terms, we can combine them together. X + X is the same as 2X. So our equation becomes 2X + 3.50 = 30.50.
Step 2: To get rid of the 3.50 on the left side of the equation, we subtract 3.50 from both sides. This way, the equal sign will still hold true. 2X + 3.50 - 3.50 = 30.50 - 3.50 simplifies to 2X = 27.
Step 3: Now, to solve for X (the cost of one shirt), we need to isolate X on one side of the equation. Since 2X means 2 times X, to undo that, we need to divide both sides of the equation by 2. That gives us (2X)/2 = 27/2 which simplifies to X = 13.50.
So, each shirt costs $13.50.
To summarize, you can solve the equation by following these steps:
- Combine the X terms on the left side of the equation.
- Simplify both sides of the equation by performing the same operation on both sides (subtracting 3.50 in this case).
- Isolate X on one side of the equation by undoing the multiplication (dividing by 2 in this case).