SOLUTION: Solve the system by substitution.
3x – y = –7
x + y = –9
Algebra.Com
Question 90831: Solve the system by substitution.
3x – y = –7
x + y = –9
Answer by malakumar_kos@yahoo.com(315) (Show Source): You can put this solution on YOUR website!
Solve the system by substitution.
3x – y = –7
x + y = –9
x+y = -9 or y = -9-x........(1)
3x - y = -7........(2)
substituting for y from (1) in (2)
3x - (-9-x) = -7
3x+9+x = -7
4x = -7-9 = -16
x = -16/4 = -4
substituting for x in (1) we get y = -9-(-4) = -9+4 = -5
The required solution is x = -4, & y = -5
RELATED QUESTIONS
Solve the system by substitution. 3x – y = –7
(answered by stanbon)
Solve the system by substitution.
3x - y = -7
x + y =... (answered by funmath)
Solve the system by substitution.
3x – y = –7
x + y = –9
(answered by checkley75)
Solve the system by substitution.
3x-y=-7... (answered by chitra)
Solve the system by substitution.
3x - y = -7
x + y =... (answered by praseenakos@yahoo.com)
Solve the system by substitution.
3x – y = –7
x + y = –9
(answered by mathdoc316)
How do I solve the system by substitution?
3x – y = –7
x + y = –9
(answered by checkley75)
Solve the system by substitution.
3x – y = –7
x + y = –9
(answered by nateobot)
Solve the system by substitution.
3x – y = –7
x + y = –9
(answered by malakumar_kos@yahoo.com)