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Автор - olgabykova2006

ДАЮ 30 БАЛЛОВ!
1. (33 + 3х) + (8х – 41) = 15
2. (19 + 2х) – (5х – 11) = 15
3. 3,2у – 1,8 – (5,2у + 3,4) = - 5,8
4. 1 – (0,5х – 15,8) = 12,8 – 0,7х
5. 3,8 – 1,5у + (4,5у – 0,4) = 2,4у + 3
6. 4,2у + 0,8 = 6,2у – (1,1у +0,8) – 2
7. 4,5 – 3,1у + (7,3у – 0,7) = 2,1у – 4,6
8. 4,7у + 2,6 = 4,2у – (2,1у + 0,3) – 2,3
9. 6,3x - (5,4x + 14) = 7 - (8 - 7,4x).

Ответ

Автор - Pshenka777
33+3х+8х-41=15
33+11х-41=15
-8+11х =15
11х = 15+8
11х =23
х= 23/11

(19+2х)-(5х-11)=15
19+2х-5х+11=15
19-3х+11=15
30-3х=15
3х=15-30
3х=-15
х=-5

3, 2у-1,8-(5,2у+3,4)=-5,8
3,2у-1,8-5,2у-3,4= - 5,8
2у-5,2=-5,8
2у=-5,8+5,2
2у=-0,6
у= - 0,3


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