Answer:
y = 0
Step-by-step explanation:
Plug in 28 for x. Solve for the equation: 
x + 3y = 28
(28) + 3y = 28
Isolate the variable, y. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS. First, subtract 28 from both sides:
28 (-28) + 3y = 28 (-28)
3y = 0
Isolate the variable, y. Divide 3 from both sides:
(3y)/3 = (0)/3
y = 0
y = 0 is your answer.
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You made a teeny mistake! Instead of 10=35x, it should be (35)(10)=x; so in this case, you would make $350 from 10 fruit baskets.
 
        
             
        
        
        
3 1/4
should be it!
Hope that helps!
        
             
        
        
        
        
14 / 20 total slices = 7 / 10, which is 0.7 if you're looking for a decimal. 
That's 70% of the pizza, which I would eat by myself.