SOLUTION: A chemical compound is made up of 5 parts of Chemical A for every 8 parts of Chemical B. (This means, for example, the if you had 5 grams of Chemical A, you could combine it with 8

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: A chemical compound is made up of 5 parts of Chemical A for every 8 parts of Chemical B. (This means, for example, the if you had 5 grams of Chemical A, you could combine it with 8      Log On


   



Question 661578: A chemical compound is made up of 5 parts of Chemical A for every 8 parts of Chemical B. (This means, for example, the if you had 5 grams of Chemical A, you could combine it with 8 grams of Chemical B to make a compound) IF you has 17 grams of the compound, how many grams of Chemical A does it contain?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+A%2FB+=+5%2F8+
given:
+A+%2B+B+=+17+ gm
+B+=+17+-+A+
Substitute this into the 1st equation
+A%2F%28%28+17+-+A+%29%29+=+5%2F8+
Multiply both sides by +8%2A%28+17+-+A+%29+
+8A+=+5%2A%28+17+-+A+%29+
+8A+=+85++-+5A+
+13A+=+85+
+A+=+85%2F13+
+A+=+5%2A%2817%2F13%29+ gm answer
and
+A%2FB+=+5%2F8+
+B+=+%288%2F5%29%2AA+
+B+=+%288%2F5%29%2A%2885%2F13%29+
+B+=+8%2A%2817%2F13%29+
( you can do the divisions )