First, let's only the expression with x stay on the let side: let's add 9 to both sides of the equation. 

which is

now, let's multiply everything by 2:


so the answer is -32!
 
        
        
        
Step-by-step explanation:
C=4x+3y Constraints: x is greater than or equal to 0 2x + 3y is greater than or equal to 6 3x - 2y is less than or equal to 9 x + 5y is less than or equal to 20
 
        
             
        
        
        
First you need to write an equation or an inequality.
5+1.80x<=12 
the x here is how many miles you are paying for, now you just solve for x. 
5+1.80x<=12
-5                 -5
1.80x<=7
/1.80         /1.80
x<=3.8
you can travel only three whole miles, you do not have enough money to go four full miles.
        
             
        
        
        
I don’t understand what this is
        
             
        
        
        
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