Step-by-step explanation:
fill in the missing fraction parts
 
        
             
        
        
        
OK first convert one of the equations into Y=MX+b form 
Y-2x = 3
Add 2X
Y = 2x +3 
Now substitute this equation in the other one.
So it would be
3X - 2Y = 5
3X-2(2x+3) = 5 
Now solve for y
3X - 4X - 6 = 5 
-1X - 6 = 5 
Add 6
-1X = 11
X = -11
Now substitute this into one of the equations
Y - 2X = 3
Y -2(-11) = 3
Y +22 = 3 
y = 3-22
y = -19
        
             
        
        
        
So you have to subtract 115 from 15. Then you divide that number by 5 for each relative. That should give you your answer....$20
        
             
        
        
        
Answer:
Step-by-step explanation:
Cost price = $n
Mark up price = selling price- cost price 
= (20% × $n)
Selling price = $n + (20% × $n)
Sales tax = 5% × ($n + (20% × $n))
Total cost = selling price + sales tax
Total cost = $n + (20% × $n) + 5% × $n + (20% × $n)
= 1.2 × $n + 0.06 × $n
= 1.26 × $n.
 
        
             
        
        
        
Answer:
$12
Step-by-step explanation:
1.75/3= 0.6 (1dp)
0.6 x 20 = 12