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12. If 10y = 7x - 4 and 12x + 18y = 1; find thevalues of 4x + 6y and 8y - x. |
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Answer» 7x-10y=4...eq(1)12x+18y=1...eq(2) Multiply eq.1 by 18Multiply eq.2 by 10 126x-180y=72....eq(3)120x+180y=10......eq(4) add eq.(3)&(4) 246x=82x=3 y=17/10 To find the value of 4x+6y substitute value of x and y 12+10.222.2 To find the value of 8y-x 13.6+316.6 4x+6y=22.28y-x=16.6 value of 4x+6y=22.28y-x=16.6 3 will be the answer 4x + 6y=22.2 8y-x =16.6 4x +6y=22.28y-x=16.6 |
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