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asked Jul 11, 2017 100k views

1 Answer

Cyberwiz · Answer 1 · 2017-07-15T17:41:13+0000

Just slot the value of x (which is 20), everywhere you see the letter x.

Similarly, slot the value of y (which is 17), everywhere you see the letter y.

So forth,

x + 8 - y

becomes

20 + 8 - 17

which evaluates to 11.

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