Question

12 - 5(х + 1) = 7 + 3х - 2х;
-0,2(3 - y) + 1,2 = -0,2(y - 1);
1 - 4z - 3(1 - z) = -5(z + 2);
(18 - x) - 7(2х - 4) = 5х + 20.
Помогите решить!

Answer 1

1 - y^2 = 2 + x 1 - y^2 = 2 + x