Question

Aflati nr necunoscut din urmatoarele expresii matematice:
(65x502:10-c-63):3=600
[(e:8+5609):2-111]:10=400
(540:6x9-755):(g-386)=5
Calculati numarul necunoscut:
b-18.179=25.582
115.303+a+37.172=98.783
165.737-c=563.345
343.452+214.126+n=989.789
Va rog dau 56 puncte si coroana

Answer 1

1)
(65x502:10-x-63):3=600
(3263-x-63)=600x3=1800
3263-x=1800+63=1860

x=3263-1860
x=1403

2)(e:8+5609):2-111]:10=400
(e:8+5609):2-111=400x10=4000

(e:8+5609):2=4000+111=4111
e:8+5609=4111x2=8222
e:8=8222-5609=2613
e=2613x8
e=20904

3)(540:6x9-755):(g-386)=5
(810-755):(g-386)=5
55:(g-386)=5
g-386=55:5=11
g=11+386
g=397

4)b-18.179=25.582
b=25582+18179
b=43761

5)115.303+a+37.172=98.783
115303+a=98783-37172=61611
a=115303-61611
a=53692

6)165.737-c=563.345
c=563345-165737
c=397608

7)343.452+214.126+n=989.789
557578+n=989789
n=989789-557578
n=432211

Answer 2

(65x502:10-c-63):3=600 
32630:10-c-63=600x3
3263-c-63=1800
3263-63-1800=c
c=1400

[(e:8+5609):2-111]:10=400
[(e:8+5609):2-111]=400x10
[(e:8+5609):2-111]=4000
[(e:8+5609):2=4000+111
[(e:8+5609):2=4111
[(e:8+5609)=4111x2
(e:8+5609)=8222
e:8=8222-5609
e:8=2613
e=2613x8
e=20904

(540:6x9-755):(g-386)=5
90x9-755=5x(g-386)
810-755=5xg-1930
55=5xg-1930
5xg=1930+55
5xg=1985
g=1985:5
g=397

b-18.179=25.582
b=25.582-18.179
b=7403

115.303+a+37.172=98.783
a=98.783-115.303-37.172
a=-53692

165.737-c=563.345
c=165.737-563.345
c=-397608

343.452+214.126+n=989.789
n=989.789-343.452-214.126
n=989.789-557.578
n=432.211