Question

afla numarul necunoscut

Answer 1

a) (36:a+63:9):2=8
36:a+7=8×2
36:a+7=16
36:a=16-7
36:a=9
a=36:9
a=4

b) b+149+[(72:8+28:4):4]=396
b+149+[(9+7):4]=396
b+149+(16:4)=396
b+149+4=396
b+149=396-4
b+149=392
b=392-149
b=243

c) 93-(85-9×9+5×8)-c=5×6+1
93-(85-81+40)-c=30+1
93-(4+40)-c=31
93-44-c=31
49-c=31
c=49-31
c=18

d) (242+360:10-214):(80:5-4×2)×d=1000
(242+36-214):(16-8)×d=1000
(278-214):8×d=1000
64:8×d=1000
8×d=1000
d=1000:8
d=125

e) 94+[(402:2+5×e)×2+8]:5=184
[(201+5×e)×2+8]:5=184-94
[(201+5×e)×2+8]:5=90
(201+5×e)×2+8=90×5
(201+5×e)×2+8=450
(201+5×e)×2=450-8
(201+5×e)×2=442
201+5×e=442:2
201+5×e=221
5×e=221-201
5×e=20
e=20:5
e=4

Dacă tu crezi că merit, astept coroana!