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a + b = -8 5a + b = -20
4a + a + b = -20
4a + (-8) = -20
4a = -12
a = -3
a + b = -8
-3 + b = -8
b = -5
f(8) = 8 . (-3) + (-5)
= -24 -5 = -29
f(5)+a5+b=-20
SPLDV. 1a+b+=-8 - 5a+b=-20
-4a=-28
a=-28/4 =7
a1+b=-8
7.1+b=-8
7b=-8
b=-8-7=-15
f(8)=7.8+(-15)
=56-15=41