Explicație pas cu pas:
X-436+1548=3034
X-436=3034-1548
X-436=1486
X=1486+436
X=1922
3325-x+1945=2343
3325-x=2343-1945
3325-x=398
X=3325-398
X=2927
X-1274+543=2451
X-1274=2451-543
X-1274=1908
X=1908+1274
X=3182
3287-x+744=2843
3287-x=2843-744
3287-x=2099
X=3287-2099
X=1188