5 x + 3 y = 41 / * 3
3 x + 2 y = 26 / * ( - 5 )
-----------------------------
15 x + 9 y = 123
+
- 15 x - 10 y = - 130
---------------------------
- y = - 7 / * ( - 1 )
y = 7
Answer:
Each program costs D ) $7
It would be (B) because 450+200x4=2620 fence posts
A) 1 out of 4
B) 1 out of 4
Do one hundred and twenty nine divided by three and you will get your answer
