б) 12-(4х+18)=(36+4х)+(18-6х)
12-4х-18=36+4х+18-6х
-6-36-18=4х-2х
-60=2х
х=-30
в)1.6х-(х-2.8)=(0.2х+1.5)-0.7
1.6x – x + 2.8 = 0.2x + 1.5 – 0.7
1,6x – x – 0,2x = – 0,7 + 1,5 – 2,8
0.4x = -2
x = -5
г)(0.5х+1.2)-(3.6-4.5х)=(4.8-0.3х)+(10.5х+0.6)
0.5x + 1.2 – 3.6 + 4.5x = 4.8 – 0.3x + 10.5x + 0.6
0,5x + 4,5x + 0,3x – 10,5x = 0,6 + 4,8 + 3,6 – 1,2
-5.2x = 7.8
x = -1.5
б) 12-(4х+18)=(36+4х)+(18-6х)
12-4х-18=36+4х+18-6х
-6-36-18=4х-2х
-60=2х
х=-30
в)1.6х-(х-2.8)=(0.2х+1.5)-0.7
1.6x – x + 2.8 = 0.2x + 1.5 – 0.7
1,6x – x – 0,2x = – 0,7 + 1,5 – 2,8
0.4x = -2
x = -5
г)(0.5х+1.2)-(3.6-4.5х)=(4.8-0.3х)+(10.5х+0.6)
0.5x + 1.2 – 3.6 + 4.5x = 4.8 – 0.3x + 10.5x + 0.6
0,5x + 4,5x + 0,3x – 10,5x = 0,6 + 4,8 + 3,6 – 1,2
-5.2x = 7.8
x = -1.5