Răspuns :
1453-x=783
-x=783-1453
-x=-670
x=670
x-633=2941
x=2941+633
x=3574
x-67-92=267
x=267+67+92
x=426
-x=783-1453
-x=-670
x=670
x-633=2941
x=2941+633
x=3574
x-67-92=267
x=267+67+92
x=426