Solve the problems
1. x - 7 > 10
a- x > 3
b- x > 7
c- x > 17
d- x > 70
2. 3x ≤ 21
a- x ≤ 7
b- x ≥ 7
c- x ≤ 18
d- x ≥ 18

3. 5a - 2 < 18
a< ?
a- 20
b- 4
c- 3
d- 100
4. 2t + 8 ≥ -4 (t + 1)
t ≥ ?
a- 
b- -2
c- -6
d- 2
you if you < 3