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Mathematics

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HELP! solving by substitution-day 2
solve the following system of equations.
{ x=-2y
{ x-y=9
(WORK MUST BE SHOWN)

Answer :

TESTACCOUNTBOTIN TESTACCOUNTBOTIN

Answer:

=2.

Step-by-step explanation: 1:x−y=9 2:2x+2y=2. Can i get brainliest?

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