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ER.NEMob.982701CLASS- X(LINEAR EQUATICSolve the following system of equationcelemination method:YDS11.x=80, y = 30] |
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Answer» x/3 + y/4 = 11.......(1)5x/6 - y/3 = - 7......(2) Multiply eq(1) by 1/3 and eq(2) by 1/4 x/9 + y/12 = 11/3........(3)5x/24 - y/12 = - 7/4.....(4) Add eq(3) and eq(4)x/9 + 5x/24 = 11/3 - 7/4(8x + 15x)/72 = (44 - 21)/1223x/72 = 23/12x = 72/12 = 6 Put value of x in eq(1)6/3 + y/4 = 11y/4 = 11 - 2y = 9*4 = 36 Therefore,x = 6, y = 36 |
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