Question

2a+5b+7;8a-3b+3;-5a-7b-6 please tell me answer

Answer 1

$2a + 8a - 5a = 5a$
$5b - 3b - 7b = - 5b$

$7 + 3 - 6 = 4$
It implies 5a-5b+4
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Answer 2

2a+5b+7=0
2a+5b=-7........(1)
8a-3b+3=0
8a-3b=-3.........(2)
multiply (1) by 3 and (2) by 5 and then add ,we get
a= -18/23
Put the value of a in (1), we get,
b= -25/23 ans
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