Question

for what value of a the system of linear equations 2x + 3y = 7 and ( a -1 )x + (a + 1)y = 3a + 1 represent parallel lines?​

Answer 1

Answer:

x = 7-3y/2

Step-by-step explanation:

2x + 3y =7

Subtract 3 from both sides

2x + 3y - 3y = 7- 3y

Simplify

2x = 7- 3y

divided both sides by two

2x/2= 7/2 -3y/2

; x =7-3y/2