Question 725895
{{{x2+6y^2=10}}}

{{{8x^2-y^2=15}}}
multiply by 6

{{{48x^2-6y^2=90}}}

add up the equations

{{{49x^2=100}}}

/49
x^2= 100/49

x= +/- 10/7

plug x and find two values of y