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determinati numarul natural x, care ferifica toate egalitatile:

a; 1453 - x=783

b;x -633=2941

c; x - 67 -92=267

d;542+ x -117 =638

e; (43+ x)+(537-214)=975

ajutati ma va rog e urgent !!!!!!

clasa a 5 a!!!!


Răspuns :

a)1453-x=783⇒1453-783=x⇒670=x⇒x=670
b)x-633=2941⇒x=633+2941⇒x=3574
c)x-67-92=267⇒x=267+67+92⇒x=426
d)542+x-117=638⇒425+x=638⇒x=638-425⇒x=213
sucees
a) 1453-x=783
     x=1453-783
     x=670

b) x-633=2941
    x=633+2941
    x=3574

c) x-67-92=267
    x=267+67+92
    x=426

d) 542+x-117=638
  542+x=638+117
  542+x=755
  x=755-542
  x=213