Question

c)3,(2)+×<9, (7)în N

Answer 1

(32-2)/9+x<(97-7)/9
30/9+x<90/9
10/3+x<10
10+3x<30
3x<20
x<20/3
x={0,1,2,3,4,5,6}

Answer 2

3,(2)+x<9,(7)
x<9,(7)-3,(2)
x<6,(5)

x € {0,1,2,3,4,5,6}