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Cameron Mayer
Mathematics
11 June, 19:24
Substitution and elimination for
Y=-3x+5
5x-4y=-3
+5
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1
)
Cristofer Kirby
11 June, 19:52
0
Y = 3x+5 (1)
5x-4y = - 3 (2)
5x-4 (-3x+5) = - 3 (3)
5x+12x-20 = - 3
17x = 17
x = 1
When x = 1,
y = - 3 (1) + 5 = 2
Check:
5 (1) - 4 (2) = 5 - 8 = - 3
x = 1, y = 2
(1,2)
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