Решить 0,8(9+2х)=0,5(2-3х); 0,5(х+3)=0,8(10-х)

Question

Решить 0,8(9+2х)=0,5(2-3х); 0,5(х+3)=0,8(10-х)

Answer 1

7,2х+1.6х=1-1.5х
1.6х+1.5х=6.2
3.1x=6.2
x=6.2:3.1
x=62:31
х=2


0.5х+1.5=8-0.8х
0.5х+0.8х=8-1.5
1.3х=6.5х
х=6,5:1.3
x=65:13
x=5