Решить 1/5(x+4)=3 -1/7 (5u-7)=6 2/3 (10-c)=-8 2t=1 1/3 (t+5) 1 1/4 (x-2)= -5 (x+1)

1) 1/5*x+ 4/5=3
1/5*x=2,2
x/5=22/10
x=(5*22)/10=11
x=11
2) -5/7u+1=6
 -5/7u=5/1
-5u=35
u=-7
3) 20/3-2с/3=-8
20-2с=-24
-2с=-4
с=2
4) 11t/3+55/3=2t
11t+55=6t
5t=-55
t=-11