Question

to eliminate ,y what number is multiplied with the equation 7x-5y=0 and then add to the equation 2x+15y+3=0​

Answer 1

Answer:

3

Step-by-step explanation:

3 must be multiplied with the equation 7x-5y=0

then the equation becomes,

21x - 15y = 0

if this equation is added to the 2nd equation then the resulting equation becomes,

21x - 15y + 2x + 15y + 3 = 0

=> 23x + 3 = 0

in this equation we clearly see that y has been eliminated