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fram the simultaneous equation write only two equation 5 years ago the ratio of the ages of pranav and his sister was 3:1 two years hence it will be 5:4 |
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Answer» -step explanation:let, the present AGE of PRANAV be x YEARS the present age of his sister is y years. 5 years ago,pranav age was(x-5) yearsand his sister age was (y-5) yearsa/c to condition 1(x-5):(y-5)=3:1 by cross multiplication,(x-5)×1=(y-5)×3x-5=3y-15x-3y=-15+5x-3y=-10......................12 years hence,pranav age will (x+2) yearsand his sister age will (y+2) yearsa/c to condition 2(x+2): (Y+2)=5:4by cross multiplication,(x+2)X4=(Y+2)X54x+8=5y+104x-5y=10-84x-5y=2.........................2two simultaneous EQUATION is FORMED. |
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