Problema Solution
Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.
-3x – 5y = 61
7x – 5y = -9
(Points : 8)
Answer provided by our tutors
Solution 1
-3x - 5y = 61
7x - 5y = -9
-21x - 35y = 427
21x-15y = -27
add the two equations
-50y = 400
y =-8
x = -7
Solution 2
-3x + 5y = 61
7x + 5y = -9
multiply first equation by 7 and second equation by 3
-21x + 35y = 427
21x+15y = -27
add the two equations
y = 8
x= -7