Question

9/a +8/b=7, 2/a - 3/b =-8​

Answer 1

Step-by-step explanation:

let take 1/a and 1/b as x and y ...

hence the equation becomes

9 X + 8 y = 7__eq1

2 x -3 y = -8__eq2

_________

multiple eq1by 2 and eq2 by 9,

then the eqation become,

18 x + 16 y =14

18 x -27y = -72 by cancel 18 x

__________

43y = 86

y=2

sub y in eq1 or 2

9x+8(2)=7

9x=7-16

9x=-9

x=-1 let 1/a and 1/b is -1 and 1/2