62.6k views
5 votes
Solve using substitution.
8x + 5y = 4
x = 3
What is x and y?

User Aleks Per
by
7.0k points

2 Answers

5 votes

Answer: x = 3 : y = -4

Explanation:

8x + 5y = 4

8(3) + 5y = 4

5y = 4 - 8(3)

5y = 4 - 24

5y = -20

(5y)/5 = -20/5

y = -4

User Breezy
by
5.9k points
6 votes

Answer: y=-4

Explanation:

8(3)+5y=4

24+5y=4

subtract each side by 24

5y=-20

divide by 5

5 y=-4

User Mwengler
by
6.4k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.