Question

7x-y=4
5x+2y=1

i know y=-13/19 but how do i plug that in to get x?

Answer 1

u said that y=-13/19 so i am finding the value of x
given : 7x-y=4
7x-(-13/19)=4
7x+13/10=4
7x=4-13/19
7x=63/19
19*7x=63
x=63/(19*7)
x=9/19
VERIFY :
7x-y=4
7(9/19)-(-13/19)=4
63/19 +13/19 = 4
(63+13)/19=4
76/19=4
4=4
HENCE VERIFIED
YOUR ANSWER IS X=9/19