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The cost of 3dozen apple and 2dozen orange in rs870 •but if buy 4dozen apple and 3 dozen orange for rs 780, find the total cost of 1 dozen apple and 1dozen orange |
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Answer»
hey buddy....... thank you for question..... let dozen of apple be x and dozen of orange be y According to GIVEN condition.. 3x+2y=870....(1) 4x+3y=780....(2) MULTIPLY(1) by 4 -- 12x+8y=3480....(3) multiply (2) by 3-- 12x+9y=2340....(4) SUBTRACT (3) and (4) 12x+8y=3480 12x+9y=2340 _______________ 0 - y= 1140 y= -1140 substitute y= -1140 in 4 12x+9(-1140)=2340 12x=2340+10260 12x=12600 x=1600 hope it helps mark me as brainliest |
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