solve for X and y .. (I) y-7÷5=2y-x÷4+3x-5. 7-5x÷2+3-4y÷6=5y-18.
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y+7/5=2y-1/4x+3x-5, =>2y-y+3*4-1/4 x-5-7/5=0
=>y+11/4 x-5*5-7/5 =0, => 20y+11x-72=0......(1)
7-5/2 x+3-2/3y=5y-18, 3*5+2y/3 +5/2 x-18-17-3=0
=> 34y+15x-168=0..........(2)
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