Question

Can someone show me the workings out to both questions please

Answer 1

Solve the inequality , find the max possible value for the variable.

3t + 1 < t + 12

2t < 11

t < 5.5

t_max = 5.5 

For the second question just solve as two separate inequalities

4 +2 < x <= 7 + 2

6 <x <= 9

x in ]6, 9]