Question

6 класс. решите 3 уравнения.
1. 2x + 13= 7x- 17
2. 0,3 (6 - 3y )= 4,5 * 0,8 (y-9)
3. x-5 x+2
----------- = -------
7 5

Answer 1

1. 2х-7х =-17-13
-5х=-30 /: (-5)
х=6
2. 1.8-0.9у=3.6у-32.4
3.6у-0.9у= -32.4-1.8
2.7у=-34.2
у=-38/3

Answer 2

1) 2x + 13 = 7x- 17
2x-7x=-17-13
-5x=-30
x=-30*(-5)
x=6