(13 + x)/(50 - x ) = (2/1)
Cross Multiply
2(50-x) = 1(13 + x)
100 - 2x = 13 + x
add 2x to both sides
100 -2x + 2x = 13 + x + 2x
100 = 13 + 3x
Subtract 13 from both sides
100 - 13 = 13 - 13 + 3x
87 = 3x 
divide both sides by 3
29 = x
(13 + 29)/(50-29) = 42/21 = 2 to 1 ratio
        
                    
             
        
        
        
Answer: 12
Step-by-step explanation:
Following PEMDAS, I’ll solve the multiplication first and then add or subtract the values from left to right.
1-2+5-2+5x2
1-2+5-2+10
-1+5-2+10
4-2+10
2+10
12
 
        
                    
             
        
        
        
Answer:
60 miles
Step-by-step explanation:
Let
x ----> the number of miles  
we know that
The number of miles multiplied by $0.60 per mile plus $2 plus the charge of $5.50 for tolls (because you are travelling from the airport)  must be equal to  $43.50
so
The linear equation that represent this problem is

Solve for x
Combine like terms left side

subtract 7.50 both sides


divide by 0.60 both sides
