Question

solve using substitution method 7x-2y=3 and 3x-y=1​

Answer 1

Step-by-step explanation:

7x-2y=3 and 3x-y=1

$7x - 2y - 3 = 3x - y - 1 \\ 3x - y - 1 = 0 \\ y = 3x - 1 \\ subtituting \: in \: 7x - 2y - 3 \\ 7x - 2(3x - 1) - 3 \\ 7x - 6x + 2 - 3 \\ x - 1 = 0 \\ x = 1 \\ y = 3x - 1 \\ y = 3 \times 1 - 1 \\ y = 3 - 1 \\ y = 2 \\ x = 1 \: \: \: y = 2$

Answer 2

3x-y =1 as x=1 and y =2 so the equation is 3-2=1 next 7x-2y =3 x=1 and y=2 so equation is 7-4=3