Question

find the value of x and y in 7x-y=5 ; 21x-3y=10 using substitution method​

Answer 1

Answer:

multiply equation first by 21 and equation 2 by 7 then cancel same cofficient and put the value in equation first .

I hope helpful for you.

Answer 2

Answer:

Refer to the above attachment ✌️

I don't if itz correct Niveethaa .