Question

Даю хорошие баллы,за хорошие ответы

Answer 1

1)
3(х-5) = 7*3*4 - 4(2х-11),
3х-15 = 84 - 8х+44,
3х + 8х = 84+44+15,
11х = 143,
х = 13,

2)
5*3 + (7х-12) = 3(х+13),
15 + 7х - 12 = 3х + 39,
7х - 3х = 39 - 15 + 12,
4х = 36,
х = 9,

3)
(2-7у) + 2(4у+7) = 3(-у),
2 - 7у + 8у + 14 = -3у,
-7у + 8у + 3у = -14 - 2,
4у = -16,
у = -4,

4)
(7у-1) - 3(у+1) = 4(2у+5),
7у- 1 - 3у - 3 = 8у + 20,
7у - 3у - 8у = 20 + 1 + 3,
-4у = 24,
у = -6

Answer 2

спс

Answer 3

:))