Question

imi trebuie urgeeent!!!

Answer 1

Răspuns:

1. a) 341:21=16 rest 5

b) 1024:11=93 rest 1

c) 14936:142=15 rest 26

2. 3(x+5)-7=29

3(x+5) = 29 + 7 = 36

x+5= 36:3

x+5 =12

=> x= 12 -5 = 7

b) 4x+5=77-2x

4x+2x=77-5

6x= 72

=> x= 72:6 = 12

c) 1-3(2-x)=x-5

1- 6 - x = x - 5

1 - 6 +5 = x + x

0 = 2x

=> x = 0

3. a) 3x - 4 < 12 + x

3x - x < 12+4

2 x < 16

x < 8

b) 3-2(x-4) > 36

3-2x - 8 > 36

3-2x> 44

-2x > -41

2x>41

2x > 20.5

c) 2x+7 < 1

2x< -6

x< -3