182k views
4 votes
Use the formula 7x-5y=-12 to find y if x=3.

2 Answers

3 votes
7(3) -5y =-12
21 -5y =-12
C.L.T
-5y = -12-21
-5y = -33
Divide all through by the co-efficient y
6.6
User Vishal Kumar Sahu
by
7.8k points
5 votes

Answer:

6
(3)/(5)

Explanation:

7x - 5y = -12 Substitute 3 for x

7(3) - 5y = -12

21 - 5y = -12 Subtract 21 from both sides

21 - 21 - 5y = -12 -21

-5y = -33 Divide both sides b y -5


(-5y)/(-5) =
(-33)/(-5)

y =
(33)/(5) or 6
(3)/(5)

Helping in the name of Jesus.

User Akhil Paul
by
7.6k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories