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a fost răspuns

Rezolvati in Q ecuatiile,apoi faceti proba :
a) 5x=8
b) -5x=-3+(-2)la a doua
c) x(9-4)=7+2
d) 17x-4x=6-(-20)

Răspuns :

a) 5x=8⇔ x=[tex] \frac{8}{5} [/tex]
b) -5x=-3+(-2²)⇔-5x=-3+4⇔ -5x=1⇔ x=[tex] \frac{1}{-5} [/tex]
c) x(9-4)=7+2⇔5x=9⇔ x=[tex] \frac{9}{5} [/tex]
d) 17x-4x=6-(-20)⇔13x=6+20⇔13x=26/:13 ⇔x=2
 Si proba e simplu de facut, inlocuiesti x in fiecare ecuatie

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