abby15dnpbslrg abby15dnpbslrg

13-07-2018
Mathematics

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is the point (9,-9) a solutionto the linear equation
-2x-y=-9

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sqdancefan sqdancefan

13-07-2018

Short answer: yes.

Substituting for x and y, you have

... -2(9) - (-9) = -9

... -18 + 9 = -9 . . . .eliminate parentheses

... -9 = -9 . . . . . . . .a true statement

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