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  • Solve for x and y: 4/x + 5y =7 3/x + 4y =5

Solve for x and y: 4/x + 5y =7 3/x + 4y =5

Answers (1)

4/x + 5y = 7 ....(i)

3/x + 4y = 5....(ii)

Assume 1/x = u

4u + 5y =7...(iii)

3u + 4y = 5...(iv)

3 x Equation (iii) - 4 x equation (iv)

12u + 15 y - 12u - 16y = 21 - 20

y = -1 

Put value of y in equation (iii)

4u = 7 + 5

u = 12/4 = 3

x = 1/3

Hence value of x, y are 1/3, -1 respectively.

Posted by

Ravindra Pindel

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