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18 votes
18 votes
If 4x – 2y = -10 and 3x – 3y = -9, what is the value of x + y?


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1 Answer

21 votes
21 votes

Explanation:

→ 4x ― 2y = ― 10 ( 1 )

And,

→ 3x ― 3y = –9 ( 2 )

Subtracting (2) from (1).

⠀⠀⠀4x ― 2y = ― 10

⠀⠀⠀3x ― 3y = ― 9

⠀⠀(-)⠀⠀(+)⠀⠀(+)

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⠀⠀⠀x + y = ― 1⠀⠀⠀⠀⠀⠀[Answer]

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User Erik Dreifaldt
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