Второе задание
1)
5t+11=7t+31
2t=-20
t=-10
2)
8t+3=3(5t-6)
8t+3=15t-18
21=7t
t=3
3)
2(5t+1)=10t+18
10t+2=10t+18
?????????
0t=16???
при любом t?
4)0,25t-35-0,5=0,25t-18
0t=......
5)13t-7+8=12t+11
13t+1=12t+11
t=10
6)(1,5t-37)-(1,5t-73)=36?
1,5t-37-1,5t+73=36
-37+73=36
36=36
ОТВЕТ ДА