A)10-7x=7-x
-7x+x=7-10
-6x=-3
6x=3
x=3/6
x=0.5
б)t+6.8=9t+10
-9t+t=10-6.8
-8t=3.2
8t=-3.2
t=-3.2/8
t=0.4
В)1+2.6z=6+3z
2.6z-3z=6-1
-0,4z=5
0.4z=-5
z=5/0.4
z=12.5
Г)2.5z-3=z-4.5
2.5z-z=-4.5+3
1.5z=-1.5
z=-1.5/1.5
z=-1
Д)3x+5=0.5x+10
3x-0.5x=10-5
2.5x=5
x=5/2.5
x=2
е)2,6+2x=1.9x+6.6
2x-1.9x=6.6-2.6
0.1x=4
x=4/0.1
x=40