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Question is on the image attached. Pls included a detailed answer. very confused.

Question is on the image attached. Pls included a detailed answer. very confused.-example-1

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When we add two equations, it's important to combine like terms

x's with x's

y's with y's

and constants with constants

2x + 5x = 7x

3y + (-y) = 2y

-5 + -12 = -17

Let's put everything together for a final equation

7x + 2y - 17 = 0

or

7x + 2y = 17

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