Question

21. Determinati numarul natural x,care verifica urmatoarele egalitati:
a)1453-x=783
b) x-633=2941
c)x-67-92=267
d)542+x-117=638
e) (43+x)+(537-214)=975

Answer 1

a)1453-x=783
x=1453-783=670
b)x-633=2941
x=2941+633=3574
c)x-67-92=267
x=267+92+67=426
d)542+x-117=638
x=755-542=213
e)43+x+537-214=975
43+x+323=975
x=975-366=609

Answer 2

a) x=1453-783
x=670
b) x=2941+633
x=3574
c) x-67=267+92
x-67=359
x=359+67
x=426
d) 542+x=638+117
542+x=755
x=755-542
x=213
e) (43+x)+323=975
43+x=975-323
43+x=652
x=652-43
x=609