rajer123
rajer123
18-01-2018
Mathematics
contestada
Solve using elimination
Respuesta :
chrysanthemum
chrysanthemum
18-01-2018
- 3x - y = 8
7x + y = -12
+__________
4x = -4
x = -1
-3(-1) - y = 8
3 - y = 8
- y = 5
y = -5
- 3(-1) - (-5) = 8 --> 3 + 5 = 8 <-- Correct
7(-1) + (-5) = -12 --> -7 -5 = -12 <-- Correct
Answer:
x = -1
y = -5
Hope this helps.
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