Question

solve the equation. 3x-4y=-1. ⅞x+⅜y=⅝​

Answer 1

Answer:

3x - 4y = -1 -------(1)

(7/8)x + (3/8)y = 5/8

multiplying with 8 on both sides

7x + 3y = 5 ---------(2)

from (1);

3x = 4y - 1

x = (4y - 1)/3 ------(3)

substitute (3) in (2) ;

7((4y-1) /3) + 3y = 5

multiplying with 3 on both sides

7(4y-1) + 3y = 5

28y - 7 + 3y = 5

31y = 12

y = 12/31

substitute y=12/31 in (1) ;

7x + 3(12/31) = 5

7x = 5 - (36/31) = (155 - 36) /31 = 119/31

x = 119/(7)(31) = (119/217)

x = 119/217

Hope this helps you...