Answer:
Step-by-step explanation:
3x=2+7 add 2 to each side
+2 +2. 2+2=4 but instead you put 3x
3x= 9 then divide 9 by 3 and your answer should be x = 3
I believe the answer 59.5 sorry if wrong
The slopes must be paralell
y=mx+b
m=slope
y=(a+1)x+3 and
y=-3x+2
a+1=-3
a=-4