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afla nemerele necunoscute ; 45:X x 100=900

25x4:X=20;   824-240:X=800;    245+50x X =745;    X: 9 x 8=808;   X x 6:9=32;  8 x X=152;  X:7=167;  185-X:=171; X:2+45-25:(36-99:9)=73;    10x20x30x40xax101=0

Răspuns :

CarMina03
45:X x 100=900
45:X =900:100
45:X =9
X =45:9

x=5


25x4:X=20
100:X=20
X=100:20

x=5


824-240:X=800

240:x=824-800

240:x=24

x=240:24

x=10


245+50x X =745
50x=745-245
50x=500
x=500:50
x=10

X: 9 x 8=808
x:9=808:8
x:9=101
x=101x9
x=909

X x 6:9=32
6x=32x9
6x=288
x=288:6
x=48


8 x X=152
x=152:8
x=19

X:7=167
x=167x7
x=1169

185-X=171
x=185-171

x=14