The book Elementary Algebra was written by author W W Rouse Walter William Rouse Ball Here you can read free online of Elementary Algebra book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Elementary Algebra a good or bad book?
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In 12 years time, his age will be equal to the sum of the ages of the three sons ; and in 14 years more, his age will be equal to the sum of the ages of the two elder. What are their present ages ? 14. If ax-\-by : a^-\-h^ = a^y -b^x : a^b^{a—b)y find x : y. 15. If a : b :: c : d, shew that a^-b^ : c^ -cP :\ ab : cd. 16. Shew that, if a : b = c : d, then If a : b = c : d=e : f, prove the relations numbered 17 to 21. 17. Pa-\-qc + re : pb + qd+rf=e :f. 18. Ae:c^ = bf '. D\ -Q a?x-\-c^y-{-e^z _ c...ex-\-eay-\-acz ^^' b'^x+d'^y+Pz ~ dfx-^-fby + bdz' 20. {a+ef : {b+ff :: c ^J'^f^^ : ds/b'^-dK 21. A:b :: y/imW + yi'^c^-p'^e^) : s]{inW\nM'^ -p^P)- RATIO AND PROPORTION. 321 22. If «! : fti = a2 : ^2=^3 • ^3) prove that C16263 + C26361 H- C36162 ~ 6^2 ' (ii) \/«i^i + \/a2^2 + Vtts^s = \/(«i + a2 + %) (^1 + ^2 + ^3)- 23. If X : a=y : b = z : c, then will each of these ratios be equal riyz-\-mzx-{-nz^ Z6c+mca+nc2 24. Prove that, if ^ : ??i=jo : q=r : s, then each of these , . , , /lmpq + lh—\lmpQr ratios IS equal to .
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