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Solve the system of linear equations in two variables by elimination or substitution. 3x+y=7 -2x-y=9
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5 votes
Solve the system of linear equations in two variables by elimination or substitution.

3x+y=7
-2x-y=9

User Pankaj Cheema
by
7.6k points

2 Answers

3 votes
3x + y = 7
-2x-y=9

3x+y=7
y=-2x-9

3x-2x-9=7
x-9=7
x=16

User Snachmsm
by
8.5k points
4 votes

Answer:

x=16, y=-41

Explanation:

User Ralph B
by
7.4k points
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