Answer & Step-by-step explanation:
The formula is given in the middle. You are supposed to insert the value of x into this formula to find the value of y (like in the first given example):

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:Done
Answer:
7/9 and 6
Step-by-step explanation:
Coefficients are intergers that are parted with a variable.
7/9 and 6 are the coefficients
In the first one it would be (21-8)-6=7.
and in the second one it would be 21-(8-6)=19
Answer:
7
Step-by-step explanation:
(+8)-(-4)+(-5)
8+4-5
12-5
7