Răspuns:
5.a+b=2582
a-b=974
le adunam
2a = 3556
a = 3556 : 2
a = 1778
b = 1778 - 974
b = 804
7.X+Y = 276×3+519 = 828+519 = 1 347
X-Y = (624:2-37):5 = (312-37):5 =
= 275:5 = 55
X+Y = 1 347
X-Y = 55
________ ( + )
2×X = 1 402
X = 1 402:2
X = 701
Y = 1 347-701
Y = 646
11.a+b+c=337
S.__.
M__.__.__.__.
P__.43.
1. Aflam cati struguri sunt.
(337-43):6=294:6=49
2.Aflam cate pere sunt.
49+43=92
3.Aflam cate mere sunt.
49x4=196
