Question

solve the system of lined equation 1/x+1/y=7, 2/x+3/y=17​

Answer 1

Answer:

1/X+1/y=7

2/X+3/y=17

put 1/X=a & 1/y=b

a+b=7----(1)

2a+3b=17------(2)

(2)-(1)

2a+3b=17 (-)

a+b=7 (multiply by 2 to make the coefficient of "a" same).

2a+3b=17 -

-2a-2b=-14 (change the symbols before subtracting)

= b=3

sub b=3 in (1)

a+b=7

a+3=7

a=7-3

a=4

1/X=4 1/y=3

1=4x 1=3y

x=1/4 y=1/3

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Answer 2

thanks for free points ..