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Kason Wiley
Mathematics
28 August, 20:20
13) - 3x - 4y = 8
-4x - 3y=6
+3
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1
)
Jocelynn Carpenter
28 August, 20:49
0
x = 0, y = - 2
Step-by-step explanation:
-3x - 4y = 8 (1)
-4x - 3y=6 (2)
Multiply (1) by - 4 and (2) by - 3, we have:
12x + 16y = - 32 (3)
12x + 9y = - 18 (4)
Subtract (4) from (3), we have:
(12x + 16y) - (12x + 9y) = - 32 - (-18)
7y = - 14
=> y = - 2
Replace y with - 2 in (3), we have x = 0
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