Răspuns :
15•28-a=178
420-a=178
a=420-178
a=242
(x-345)•7=63
y•7=63
Y=63:7
y=9
x-345=9
x=345+9
x=354
b-418•31=726
b-12 958=726
b=12 958+726
b=13 684
420-a=178
a=420-178
a=242
(x-345)•7=63
y•7=63
Y=63:7
y=9
x-345=9
x=345+9
x=354
b-418•31=726
b-12 958=726
b=12 958+726
b=13 684
a) 15*28-a=178
420-a=178
a=420-178
a=242
b) (x-345)*7=63
x-345=63:7
x-345=9
x=345+9
x=354
c) b-418*31=363*2
b-12958=726
b=12958+726
b=13684
sper ca te.am ajutat .
coroana?
420-a=178
a=420-178
a=242
b) (x-345)*7=63
x-345=63:7
x-345=9
x=345+9
x=354
c) b-418*31=363*2
b-12958=726
b=12958+726
b=13684
sper ca te.am ajutat .
coroana?