Question

Va rog dau coroana! rezopvati următoarele inecuatii!​

Answer 1

Răspuns:

a. x+2<14

x<14-2

x<12

b.2x+5≤17

2x≤17-5

2x≤12

x≤6

c.(21+17)+2(x-5)<42

38+2(x-5)<42

38+2x-10<42

28+2x<42

2x<42-28

2x<14

x<7

a. 2≤x-3≤5

x-3≥2

x-3≤5

x≥5

x-3≤5

x≥5

x≤8

x€[5,8]

Answer 2

Răspuns:

a. x+2 < 14

x < 14-2

x < 12

x={0,1,2...11}

b.2x+5 ≤ 17

2x ≤ 17-5

2x ≤ 12

x ≤ 6

x={0,1,2,3,4,5,6}

c.(21+17)+2(x-5) < 42

38+2(x-5) < 42

38+2x-10 < 42

28+2x < 42

2x < 42-28

2x < 14

x < 7

x={0,1,2,3,4,5,6}

a. 2 ≤ x-3 ≤ 5

x-3 ≤ 5

x ≤ 5+3

x ≤ 8

2 ≤ x-3

2+3 ≤ x

x ≥ 5

x= {5,6,7,8}