Question

Tot exercitiul, nu cer tot exact, dar cat se poate va roogg (este 80% din nota finala ) dau corona

Answer 1

a) 8(1-x)+7x-10<2(7-x)-9

8-8x+7x-10<14-2x-9

-x-2>-2x+5

-x>-2x+7

0>-x+7

-7>-x

x>7

b) 2(x+5)+15>_6(2x+1)+9

2x+10+15>_12x+6+9

2x+25>_12x+15

2x>_12x-10

0>_10x-10

10x<10

x<1

c) 4(x+5)+6(2-x)>_3x-8

4x+20+12-6x>_3x-8

-2x+32>_3x-8

-2x>_3x-40

0>_5x-40

5x<_40

x<_8

d) 11-7x+2(1-x)+3x>_5(3-x)-7

11-7x+2-2x+3x>_15-5x-7

-6x+13>_-5x+8

-6x+5>_-5x

-x+5>_0

-x>_-5

x<_5

e) 4x+6(x+2)<_36+2(2x+3)

4x+6x+12<_36+4x+6

10x+12<_4x+42

10x-30<_4x

6x-30<_0

6x<_30

x<_5

f) 9x+33>3(2x+3)+3(3x+2)

9x+33>6x+9+9x+6

9x+33>15x+15

9x>15x-17

0>6x-17

6x<17

x<17/6

g) 5(2x-1)+3(x+1)+2(3-5x)<_7(2-2x)+2(3x+6)

10x-5+3x+3+6-10x<_14-14x+6x+12

3x+4<_-8x+26

3x-22<_-8x

11x-22<_0

11x<_22

x<_2

h) 5(3x-7)+28<_3(2x-13)+4(2x+9)

15x-35+28<_6x-39+8x+36

15x-7<_14x-3

15x-4<_14x

x-4<_0

x<_4

<_ inseamna mai mic sau egal

>_ inseamna mai mare sau egal