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Agata [3.3K]
3 years ago
12

I NEEED HELP ASAP PLEASE

Mathematics
2 answers:
steposvetlana [31]3 years ago
4 0
<span>-3a+7b=-16
-9a+5b=16

multiply 1st equation by 3

</span><span>-9a + 21b = -48
-9a + 5b =16
------------------------subtract
 16b = -64
     b = - 4

</span>-3a+7b=-16
-3a+7(-4)=-16
-3a = -16 +28
-3a = 12
   a = -4

answer
a. first choice

<span>The values of a and b are both equal to –4.</span>
Aloiza [94]3 years ago
3 0

This is correct on e2020

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