document.write( "Question 1196511: If 8x=3y=7z, find x:y:z \n" ); document.write( "
Algebra.Com's Answer #829403 by greenestamps(13200)![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "I have no idea what tutor @josgarithmetic was doing to solve the problem; in any case, his answer does not satisfy the given conditions. \n" ); document.write( "Here are a few ways you can solve this kind of problem. \n" ); document.write( "(1) Choose any value for one variable and use the given ratios to find the corresponding values of the other two. Then make a ratio of the three values, and convert the ratio to whole numbers if needed. \n" ); document.write( "y = 1 --> x=3/8; z = 3/7 \n" ); document.write( "the ratio x:y:z is (3/8):1:(3/7) = 21:56:24 \n" ); document.write( "(2) Given 8x, 3y, and 7z all equal to the same number, let that number be the LCM of the three coefficients: 8*3*7 = 168. Then \n" ); document.write( "x = 168/8 = 21; y = 168/3 = 56; z = 168/7 = 24 \n" ); document.write( "and the ratio is again x:y:z = 21:56:24 \n" ); document.write( "(3) Having observed how solution method (2) works, you should be able to see that the solution is simply \n" ); document.write( "x:y:z = (3*7):(8*7):(8*3) = 21:56:24 \n" ); document.write( " \n" ); document.write( " |