Question

The pair of equations 3x-5y=7 and 6x+10y=7 have ______ solutions.​

Answer 1

Answer:

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

6x-10y=14-------(1).

6x+10y=7

- - -

________

-20y=7

y=-7/30

6x+10y=7

6x+10(-7/20)=7

6x-7/2=7

6x=7+7/2

6x=14/2+7/2

x=21/12

x=7/4