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(iii) 3 chairs and 4 tables cost 18,000, 4 chairsand 3 tables cost * 15,600. Find the cost of achair and a table.Solution : |
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Answer» let cost of one chair is equal to x and cost of one table is equal to y then 3x+4y=18000...1and 4x+3y=15600therefore 7 x + 7 y is equal to 33600therefore x + y is equal to4800which implies x is equal to 4800 - ysubstitute this in equation number 13(4800-y)+4y=1800014400+y=18000which implies y is equal to3600 and x is equal to 1200. 3x+4y=18000; 4x+3y=15600;; 15600+18000=33600; 7 chairs+7 tables:; x+y=equal 4800, 3(4800-y)+4y=18000; 18000-14400=3600 and x=1200 |
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