Question

The expression 4x/5 - 2x/3 is equivalent to...
a) x/2
b) x/5
c) x/15
d) 2x/15

Answer 1

now remember to subtract fractions we need to multiply both by the LCD

Answer 2

\[\frac{ 4x }{ 5 }*(15)-\frac{ 2x }{ 3 }*(15)\]

Answer 3

Which results in the following

\[\frac{ (4x*3) -(2x*5)}{ 15 }\]

Answer 4

I'm confused. What would be the final answer then? Sorry, I don't really get subtracting fractions.

Answer 5

well, we need to make the denominator the same if you notice they are different 3 and 5, so we must multiply each fraction by the least common denominator of 3 and 5 which is 15.

this gives us
\[\frac{ 2x }{ 15 }\]

Answer 6

Thank you so much! Would you mind helping me with other problems if you have time?