Question

solve 3x - y = 3 and 9x - 3y = 9 by substitution method

Answer 1

3x-y=3 -----(1)

9x-3y=9------(2)

x= 3+y / 3 

9 ( 3+y / 3) = 9 

27+9y /3 = 9

27 +9y = 9*3

9y = 27-27

9y =0

y=0/9 

y=0

(put value of y in 1st equation)

3x-y=3

3x-0=3

3x=3

x=3/3

x = 1

(1,0)

therefore, value of x and y by substitution method is 1 and 0

Answer 2

Answer:

Step-by-step explanation:

Attached