Solve graphically 4x-3y+4=0, 4x+3y-20=0

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Sriparna Nandi

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4x-3y+4=0 or, 4x-3y=-4-------------------(i) 4x+3y-20=0 or,4x+3y=20------------------------(ii) adding from (i) & (ii) 4x+3y=20 4x-3y=-4 -------------------- 8x=16 (because +3y and -3y cancel out) or,x=16/8 or, x=2 Then value of y from equation (i) so, 4x-3y=-4 or, 4*2-3y=-4 or,...
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4x-3y+4=0 or, 4x-3y=-4-------------------(i) 4x+3y-20=0 or,4x+3y=20------------------------(ii) adding from (i) & (ii) 4x+3y=20 4x-3y=-4 -------------------- 8x=16 (because +3y and -3y cancel out) or,x=16/8 or, x=2 Then value of y from equation (i) so, 4x-3y=-4 or, 4*2-3y=-4 or, 8-3y =-4 or, -3y= -8-4 or, -3y=-12 or, y= -12/-3 0r, y= 4 Ans is x=2 y=4 Thank you. read less
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