Răspuns:
a) ( x+ 2.541) - 6.915=1.909
( x+2.541)=1.909+6.951
x+2.541=8.8.824
x=8.824--2541
×=6.283
V: (6.283- 2.541) -6.915=1.909
b) 5.280- (8209-x)=2774
(8209-x)=5280-2774
8.209-x= 2.506
x = 8.209- 2.506
x =5703
V: 5280-(8209-5703)=2774
c) ( x- 5.438)+5.980=9.654
(x-5.438)=9.654-5980
x-5.438=3.674
x=3.674+5.438
x= 9.112
V: (9.112- 5.438)+5.980=9.654
d) (3.159+x) -8.154=1.069
( 3.159+x) =1.069+8.154
3.159+x= 9.223
x = 9.223 - 3.159
x= 6.064
V : (3.159 + 6.064) - 8.154 =1.069
