Question

Exercitiu nr 3 dau coroana​

Answer 1

Răspuns:

a)

4-5+8x=15

8x=15-4+5

8x=16 => x= 2

b)

5-x=3 =>-x= -2 /-1 => x=2

c)

4x-3=17

4x=20=> x=5

d)

x+5=5 =>x=1

e)

afirmatia este falsa => x=multimea vida

f)

|x+5| (-5*1 + 6*1)=19-18x-90

(x+5) (-5+6)=18x-71

(x+5) +18 *(x+5)=19

x+5 *19=19 => x+5=1=>x=-4