Răspuns :
a)1961:x=53
x=1961:53
x=37
b)(5•y+7):24=13
5y+7=13×24
5y+7=312
5y=312-7
y=305:5
y=61
c)236:(7•z-3)=59
236:59=7z-3
4=7z-3
4+3=7z
z=7:7
z=1
a)1961:x=53
x=1961:53
x=37
b)(5•y+7):24=13
5y+7=13×24
5y+7=312
5y=312-7
y=305:5
y=61
c)236:(7•z-3)=59
236:59=7z-3
4=7z-3
4+3=7z
z=7:7
z=1