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In a factory, Anton and Joey make the same item. One day Anton made 39 more than three times what Joey made, and together they made 79. How many items did joey produce in that day?

Sagot :

Let the number of items Joey made be [tex]x[/tex]
This would make the number of items Anton made be [tex]3x+39[/tex]

We know that:
# of Anton's items+ # of Joey's items= 79

So we use the variables
[tex]x+(3x+39)=79 \\ 4x+39=79 \\ 4x=40 \\ x=10[/tex]

Therefore, 
Anton made 3(10)+39=69
and Joey made 10 items