Question 980617
{{{(3/8)+(4/5)=x/20}}}


1.  Find the LCM of the denominators 8, 5, 20:


8:  8, 16, 24, 32, 40


5:  5, 10, 15, 20, 25, 30, 35, 40


20:  20, 40


Therefore, 40 is the LCM.


2.  Multiply each fraction of the equation by 40, which will give us:


15 + 32 = 2x


3.  Add 15 and 32, giving us:


47 = 2x


4.  Divide both sides by 2, giving us:


47/2 = x ----->


23.5 = x


You should be able to use either 47/2 or 23.5 or 23 1/2 as your answer, unless you are told you can only use one of the three.