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ICSE Class 9 Answered

solve 4/X + 3/4=2 , 3/X - 2/4=5 by elimination method
Asked by deepvishal771 | 27 Jul, 2020, 11:26: AM
Expert Answer
The question should be, solve the following by elimination method: 4/x+3/y=2 and 3/x-2/y=5
Let space straight a equals 1 over straight x space and space straight b equals 1 over straight y
rightwards double arrow 4 straight a plus 3 straight b equals 2 space... space left parenthesis straight i right parenthesis space
and comma space 3 straight a minus 2 straight b equals 5 space... left parenthesis ii right parenthesis
left parenthesis straight i right parenthesis cross times 2 space plus space left parenthesis ii right parenthesis cross times 3
rightwards double arrow 17 straight a equals 19
rightwards double arrow straight a equals 19 over 17
rightwards double arrow straight b equals fraction numerator negative 14 over denominator 17 end fraction
Hence comma space straight x equals 17 over 19 space and space straight y equals negative 17 over 14
Answered by Renu Varma | 27 Jul, 2020, 12:10: PM
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