Question

va rog ajutatima help me​

Answer 1

Răspuns:

1) -32<=5x+2<=32 /-2

-32-2<=5x<=32-2

-34<=5x<=30 /:5

-34/5<=x<=30/5

-34/5<=x<=6

xe[-34/5;6] (daca esti clasa a 8a scrie si asta daca nu, nu)

2) -25<2x-3<25 /+3

-25+3<2x<25+3

-24<2x28 /:2

-24/2<x<28/2

-12<x<14

xe(-12;14)

3) -1<x-6/5<1 /×5

-1×5<x-6<1×5

-5<x-6<5 /+6

-5+6<x<5+6

1<x<11

xe(1;11)

4) -7<=2x+1/3<=7 /×3

-7×3<=2x+1<=7×3

-21<=2x+1<=21 /-1

-21-1<=2x<=21-1

-22<=2x<=20 /:2

-22/2<=x<=20/2

-11<=x<=10

xe[-11;10]