а. 1,6b-0,4=3,2-0,8(2-b)
1,6b-0,4=3,2-1,6+0,8b
1,6b-0,8b=3,2-1,6+0,4
0,8b=2
b=2,5
б.2(n-3)-4(5-2n)=-5-(4n+7)
2n-6-20+8n=-5-4n-7
2n+8n+4n=-5-7+20+6
14n=14
n=1
а.1,6b-0.4=3.2-0.8(2-b)
1.6b-0.4=3.2-1.6+0.8b
1.6b-0.8b=3.2-1.6+0.4
0.8b=2
b=2.5
2n+8n+4n=-5-7+6+20
в.-0,2(6х+1)\3,6=0,5х\9
-6.2x-0.2\3.6=0.5х\9
-31х+1= х
-32х=-1
х=1\32
а. 1,6b-0,4=3,2-0,8(2-b)
1,6b-0,4=3,2-1,6+0,8b
1,6b-0,8b=3,2-1,6+0,4
0,8b=2
b=2,5
б.2(n-3)-4(5-2n)=-5-(4n+7)
2n-6-20+8n=-5-4n-7
2n+8n+4n=-5-7+20+6
14n=14
n=1
а.1,6b-0.4=3.2-0.8(2-b)
1.6b-0.4=3.2-1.6+0.8b
1.6b-0.8b=3.2-1.6+0.4
0.8b=2
b=2.5
б.2(n-3)-4(5-2n)=-5-(4n+7)
2n-6-20+8n=-5-4n-7
2n+8n+4n=-5-7+6+20
14n=14
n=1
в.-0,2(6х+1)\3,6=0,5х\9
-6.2x-0.2\3.6=0.5х\9
-31х+1= х
-32х=-1
х=1\32