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

What dose 3x-5y=15 and 2x-y=-4 really equel-example-1
User Dandaka
by
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2 Answers

7 votes
The correct answer would be (-5,-6). Hope that helps!
User Ptntialunrlsd
by
7.2k points
7 votes
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)
User Gustavo Dias
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