The longest side is 5/(5+3+4) = 5/12 of the perimeter, hence
(5/12)*156 cm = 65 cm . . . . . the length of the longest side
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Answer:
Solving the inequality we get x>-9.33
The graph is shown in figure attached.
Step-by-step explanation:
We need to solve the inequality: 
Solving:

Switching the sides , reversing the inequality and Multiply 3 with terms inside the bracket

Subtract 6 from both sides

Divide both sides by -3 and inequality will be reversed

Solving the inequality we get x>-9.33
The graph is shown in figure attached.