# How do you subtract #\frac { 7x } { 4} - \frac { 3x } { 5}#?

Create a common denominator for both fractions so that they can be subtracted.

Now that both terms have the same denominator the terms can be subtracted.

By signing up, you agree to our Terms of Service and Privacy Policy

In order to add or subtract fractions, they must have the same denominator, called the least common denominator (LCD). To find the least common denominator, write the multiples for each denominator. The lowest (least) multiple in common is the LCD.

Multiply.

Simplify.

By signing up, you agree to our Terms of Service and Privacy Policy

To subtract (\frac { 7x } { 4} - \frac { 3x } { 5}), find a common denominator, which is the least common multiple (LCM) of 4 and 5, which is 20. Then, rewrite each fraction with the common denominator.

(\frac { 7x } { 4}) becomes (\frac { 35x } { 20}), and (\frac { 3x } { 5}) becomes (\frac { 12x } { 20}).

Now, subtract the numerators and keep the common denominator:

(\frac { 35x } { 20} - \frac { 12x } { 20} = \frac { 35x - 12x } { 20} = \frac { 23x } { 20}).

So, (\frac { 7x } { 4} - \frac { 3x } { 5} = \frac { 23x } { 20}).

By signing up, you agree to our Terms of Service and Privacy Policy

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

- How do you convert 4.64 into a fraction and percent?
- Aaron buys a tie and a belt. The prices of the tie and belt are in the ratio 2 : 5. If both items cost $539, (a) what is the price of the tie? (b) what is the price of the belt?
- How do you convert #0.bar(45)# (meaning the #45# is being repeated) to a fraction?
- There are #77# right-angled blocks of dimensions #3xx3xx1#. Is it possible to place all these blocks in a closed rectangular block of dimensions #7xx9xx11#?
- How do you subtract #\frac { 20} { 33} - \frac { 30} { 33}#?

- 98% accuracy study help
- Covers math, physics, chemistry, biology, and more
- Step-by-step, in-depth guides
- Readily available 24/7