the total cost of 5 pens and 10 pens is 30 . of pen cost 3 more than the pencil . find the cost of each item
It would help if you proofread your questions before you posted them.
To find the cost of each item, let's use algebraic expressions.
Let's say the cost of a pencil is "x" units.
According to the given information, the cost of a pen is 3 units more than the cost of a pencil. So the cost of a pen would be "x + 3" units.
Now we can set up the equation:
5pens + 10pens = 30
Replacing the cost of a pen with "x + 3" units, we get:
5(x + 3) + 10(x + 3) = 30
Now we can simplify and solve the equation:
5x + 15 + 10x + 30 = 30
Combining like terms, we have:
15x + 45 = 30
Subtracting 45 from both sides:
15x = 30 - 45
15x = -15
Dividing both sides by 15:
x = -15/15
x = -1
The cost of a pencil is -1 unit, which doesn't make sense in this context. It means there might be an error in the given information or the problem statement.
Please double-check the provided information to ensure accuracy.