Răspuns :
1)1938+x=2301 x=2301-1938 x=363 2) x-748-3654=97 x-748=97+3654 x-748=3751 x=3751+748 x=4 499 3) 957+3185-x=1634 3185-x=1634-957 3185-x=677 x=3185-677 x=2508