Question

aflati după caz nr necunoscut:a)1961:x=53 b) (5×y+7):24=13 c) 236:(7×z-3)=59

Answer 1

a)1961:x=53
x=1961:53
x=37

b) (5×y+7):24=13
5y+7=13*24
5y=312-7
5y=305
y=61

c) 236:(7×z-3)=59
236=(7z-3)*59
236=413z-177
413z=177+236
413z=413
z=1

Answer 2

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