Question

1/3x=10 what does x equal??

Answer 1

Do you know how to find the LCD?

Answer 2

LCD is equal to LCM of the denominators.

Answer 3

Aidanas? do you understand

Answer 4

no thats why i posted the question

Answer 5

Okay so you need to find a common number in 25 and 4

Answer 6

Do you know how to find LCM?

Answer 7

Do you know what that would be and konrad ill help him you can help somone else

Answer 8

Whatever...

Answer 9

The LCD (least common denominator) is the LCM (least common multiple) of the denominators, 25 and 4.
One method of finding the LCM is to list some multiples of both numbers and to see which is the smallest number that is a multiple of both.

Answer 10

Here are some multiples of 25:
25, 50, 75, 100, 125, 150
Now you can list multiples of 4 until you find one that is also a multiple of 25. The first one is the LCM.
4, 8, 12, 16, 20, 24, 28, ...
So far non are the same. Keep going until one is also a multiple of 25.

Answer 11

to find the least common multiple
one approach
write out the multiples of each number and find first number that is common in each group
another approach is just multiply the numbers

Answer 12

@triciaal
Multiplying the numbers together will definitely give you a common multiple, but it won't necessarily be the least common multiple. It is only the least common multiple if there are no factors of the two numbers in common. In the case of 25 and 4, where there are no factors in common, it will work. With numbers such as 8 and 12, where there are common factors, the LCM is much less than 8 * 12.