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Solve by using elimination 3x+y=27 -3x+4y=-42

Solve by using elimination 3x+y=27 -3x+4y=-42
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Solve by using elimination 3x+y=27 -3x+4y=-42

User Naitan
by
8.3k points

1 Answer

1 vote
hello :
3x+y=27 ...(1)
-3x+4y=-42 ...(2)
(1) +(2) : 5y = -15
y = -3
subsct in : (1) 3x -3 = 27
3x= 30
x=10

User Lukas Pirkl
by
7.5k points
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