Question 48799
80=10x
First get the x by itself 
to do this divide both sides by 10
80/10=8
10x/10= 1x or x

so..
8=x 


2/5x= -10
get the x by itself by multiplying both sides by 5 to make the 5 a fraction put 5 over 1
    
2x/5 times 5/1  the fives cancel  so you have  2x/1 or 2x                                                                             

-10 times 5= -50
so
2x= -50
now divide both sides by 2
2x/2=1x or x
-50/2= -25
x=-25



just to show you:
2x/5 times 5/1= 2x
-10 times 5= -50

2x= -50

2x/2=x
-50/2= -25

x= -25