Răspuns :
27 x c - 464 = 400
27 x c = 400 + 464
27 x c = 864
c = 864 : 27
==> c = 32
27 x c = 400 + 464
27 x c = 864
c = 864 : 27
==> c = 32
27×c-464=400
27×c=464+400
27×c=864
c=864:27
c=32
Proba :
27×32-464=864-464
=400
27×c=464+400
27×c=864
c=864:27
c=32
Proba :
27×32-464=864-464
=400