Am nevoie de ajutor repede dau corana si puncte promit

a) x+1237 = 2000 ; x = 2000-1237 = 763
b) x-154 = 1732 ; x = 1732+154 = 1886
c) 457-x =104 ; x = 457-104 = 353
d) 349+x =743 ; x = 743-349 = 394
A) x =2000-1237
x= 763
B) x= 154+1732
x= 1886
C) x= 457- 104
x= 353
D) x=743- 349
x= 394