8x +12 = 5x + 8
х=-1.3
0,3(x -(- 2)) = 0,6 -(- 0,2) (x + 4)
х=8
Пошаговое объяснение:
8x +12 = 5x + 8
8х-5х=8-12
3х=-4
х=-4/3
х=-1 1/3
х=-1.3
0,3(x -(- 2)) = 0,6 -(- 0,2) (x + 4)
0.3(х+2)=0.6+0.2(х+4)
0.3х+0.6=0.6+0.2х+0.8
0.3х=0.2х+0.8
0.3х-0.2х=0.8
0.1х=0.8
х=0.8:0.1
х=8
