00:01
Hello, we will be doing problem one from pre -calculus 2013.
00:07
So we have this rational equation here where x over 5x plus 4 is equal to 3.
00:14
So you're asking for us to find the value of x so that this thing here would be equal to 3.
00:25
So the first step is to cross multiply.
00:31
We will have this.
00:33
When we multiply the first part by 5x plus 4, because you're cross multiplying, we will only have x left.
00:43
And for the second part, it'll multiply 3 by 5x plus 4s.
00:48
So we are multiplying both sides by 5x plus 4, and we will have this.
00:55
No more 5x plus 4 here.
00:58
It went away.
01:00
And this is the second part of multiplication, and we will have, and then we will multiply 3 by 5x and plus 3 times 4.
01:13
It will be x equal to 15x plus 12...