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5×n+245=845
54:n+67×5=344
n:3×8=616
894-n:4=833


Răspuns :

5n=845-245. n=600:5. n=120
54:n=344-335. n=54:6. n=9
n:3=616*8. n=4928*3=14784

n:4=894-832. n=52*4. n=208
5xn+245=845 5xn=845-245 5n=600 n=600:5 n=120 54:n+67*5=344 54:n+ 335 =344 54:n =344 -335 54:n=6 54=nx6 54:6=n 9=n n=9 n:3x8=616 n:24=616 n=24x616 n=14784 894-n:4=833 894=833+n:4 894-833=n:4 61=n:4 61x4=n 244=n n=244