8х-3=2х+9 2(3-2х)+1=-4+х (х-2)•(х+3)=0 (12у+18)•(1,6-0,2у)=0 - вопрос №808779183292321423012181602064239 от artem870 05.10.2020 17:13

Question

Математика: 8х-3=2х+9 2(3-2х)+1=-4+х (х-2)•(х+3)=0 (12у+18)•(1,6-0,2у)=0 6х+4+2х=3х-9 1,5•6²-2³

artem870 · Answer

1. 8х-3=2х+9
8х-2х = 9+3
6х = 12 /:6
х = 2

2. 2(3-2х)+1 = -4+х
6-4х+1 = -4+х
-4х-х = -4-6-1
-5х = -11 /:-5
х = 2,2

3. ---

4. ---
5. 6х+4+2х = 3х-9
6х+2х-3х = -9-4
5х = -13 /:-5
х = 2,6

6. 1,5*6²-2³
1,5*36-8
46