Question

what is the solution ; l2x-5l<21

Answer 1

first you need to add 51 to both sides which gives
12x<72
then to get x on its own you divide both sides by 12

Answer 2

ummmm there are no 51
or 12 there the parrelel lines(:

Answer 3

oh ok sorry, thought that was a 1

Answer 4

no is okay (:

Answer 5

l2x-5l<21
2x<26 (+5 both sides)
x<13 (/2 both sides)