Question

5x-6y=400&6x+25y=3500

Answer 1

Solution;

Given:
5x-6y=400...(i)
6x+25y=3500...(ii)

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(i)=> 5x-6y=400

=> 5x=400+6y

=> x=400+6y/5 ...(iii)

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(ii)=> 6x+25y=3500

=>6(400+6y/5)+25y=3500

=>2400+36y/5+25y=3500

=>2400+36y+125y/5=3500

=>2400+161y=(3500)5

=>2400+161y=17500

=>161y=17500-2400

=>161y=15100

=>  y=15100/161...(iv)

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(i)=> 5x-6y=400

=> 5x -6(15100/161)=400

=> 5x -90600/161=400

=>805x-90600/161=400

=>805x-90600=400(161)

=>805x-90600=64400

=>805x=64400-90600

=>805x=-26200

=>161x =-5240

=> x =5240/161
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x=-5240/161,
y=15100/161  Hope it Helps!