how to solve math problems

solve the following linear equation using the multiplication property of equilty
3/10p= - 15/11

I know that we have to flip 3/10 p
3/10p =-15/11

10/3 *3/10p= - 15/11*10/3
p=15/11*10/3

how we can get -50/11

this is the answer but I dont know how we got this answer .


how to multiplay this fracution

I need AN explanation ..

AND
THIS Q
LAUREN'S BEDROOM MESURES 16 FEET BY 11 FEET , WITH A CLOSET THAT MEASURE 3 FEET BY 6 FEET .IF CARPET COAST $3.75 PER SQUARE FOOT,HOW MUCH WILL IT COAST TO CARPET LAUREN'S ROOM ND CLOSET ?

I NEED THE STEPS TO SOLVE THIS PROBLEM

THE ANSWER IS $727.50

AND THIS
The sum of tow consecutive odd integers is 128 .find the number .
the answer is : The intergers are 63,65

I need to know the steps of this problem ...


Thank you