Search 75,717 tutors
FIND TUTORS
Ask a question
0 0

Use addition or substitution to find the value of y for this set of equations. top line 2x - 3y = -15 bottom line x = 4y

Tutors, please sign in to answer this question.

2 Answers

x = 4y ---> x - 4y = 0 Let's multiply this equation by (-2)
              -2x + 8y = 0 
              +     
               2x - 3y = - 15   
               0   + 5y = -15 ----> y = -3
x = 4 * (-3) -----> x = -12
 Answer:    (-12, -3)

Comments

Comment

Hi Amber,

try the methods that we all showed you in your previous questions. I can help you if you get stuck. To get you started try this

2x-3y=-15

x-4y = 0

hope this helps!