−4(2,3x − 3) − (5 − 2,6x) + 3(0,6x − 2) = -9,2х+12-5+2,6х+1,8х-6= - 4,8х+1= -4,8*512+1= -2457,6+1= - 2456,6
17×3х-17×16=238
51х-272=238
51х=238+272
51х=510
х=10
8×133-8×5х=864
1064-40х=864
40х=1064-864
40х=200
х=5
Тримай ..................
13x+5x=54 => 18x=54 => x=3
29y-17y=48 => 12y=48 => y=4