Ln x=5-2
ln x=3
ln x is base e log x
so,
x=e^(3)
x=20.0855369232
In the step after -6x+10=4x+20, he moved the terms incorrectly. you have to add 6x to both sides so it would be 10=4x+6x+20 which simplifies to 10=10x+20. subtract 20 from both sides to get -10=10x. divide both sides by 10. the answer is x=-1
7203 is greater because it font got no decimal or nothing. Is a whole number
0.43 is greater because you need 7 to get to 0.5 unlike 0.42 where you need 8
9+(-9)=0 you are showing the opposite sign of the number that added together would give you the sum of zero.