Answer:
1) 4x - 10 = 30, Add 10 to both sides
4x=20, divide 4 on both sides
x=5
2) 17 = T - 9, add 9 to both
26=T
3) 36 = c + 20, subtract 20 to both
16=c
4) Y + 5 = 18, subtract 5 to both
Y=13
5) 3 = y + 12, subtract 12 to both
-9=y
6) S + 12 = 8, subtract 12 to both
S=-4
7) 7 < 3 - 2x, subtract 3 to both
7<-2x, divide -2 on both sides and flip sign
-
>x