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7nadin3 [17]
3 years ago
14

What dose 3x-5y=15 and 2x-y=-4 really equel

Mathematics
2 answers:
podryga [215]3 years ago
6 0
3x - 5y = 15 -----> 1 
2x - y = -4 ------>2 
multiply eqn2 by -5 and add eqn 1 
3x-5y = 15 
-10x +5y = 20 
--------------------
-7x = 35 
x = -5 
sub in eqn 2 
2(-5) - y = -4 
-10 - y = -4 
-y = -4+10 
-y = 6 
y = -6 
so the answer is (-5, -6)
myrzilka [38]3 years ago
4 0
The correct answer would be (-5,-6). Hope that helps!
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