Question

Rezolvați :
1). 2 ( 8 X - 2 ) <sau egal 10
2) 3 ( X - 2 ) < sau egal cu 3
3 ) 6 • ( X + 4 ) - 24 < sau egal cu 12

Answer 1

1)2(8x-2)<sau egal10
16x-4<sau egal10
16x<sau egal14
x<sau egal 14/16 simplificam 
x<sau egal 7/8
2)3(x-2)< egal3
3x-6< egal3
3x<egal9
x< egal9:3
x={0,1,2,3}
3)6(X+4)-24<egal12
6x+24-24<egal12
6x<egal12
x<egal2
x={0,1,2}

Answer 2

1) 2(8x-2)<sau egal 10/ :2
8x-2 <=5/+2
8x<=7
x=8:7
x=1 rest 1
x= nr. nat. |=>x={ 1,2,3,4,5,6,7,8,9,10}

2) 3(x-2)<=3/:3
x-2<=1
x=2-1
x=1
x= nr. nat.l=>x={ 1,2,3}

3) 6(x+4)-24<=12/+24
6(x+4)<=36/:6
x+4<=6/-4
x=2
x=nr. nat.l=>x={2,3,4,5,6,7,8,....,12

semnul acesta<=la m pus ca să fie mai uşor