Question

Alflati pe a

a - 84 <1


a + 89 < 91

Answer 1

a-84<1
a<84+1
a<85
a=84

A+89<91
a<91-89
a<2
a=0,1

Answer 2

$a-84\ \textless \ 1 \\ a\ \textless \ 1+84 \\ a\ \textless \ 85$
x apartine (-infinit, 85)

$a+89\ \textless \ 91 \\ a\ \textless \ 91-89 \\ a\ \textless \ 2$
x apartine (-infinit, 2)