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Mathematics
Bria Stevens
23 May, 17:02
Substitution y=3x+8; 5x+2y=5
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Robert Mercer
23 May, 20:40
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Y = 3x + 8
5x + 2y = 5
5x + 2 (3x + 8) = 5
5x + 2 (3x) + 2 (8) = 5
5x + 6x + 16 = 5
11x + 16 = 5
- 16 - 16
11x = - 11
11 11
x = - 1
y = 3x + 8
y = 3 (-1) + 8
y = - 3 + 8
y = 5
(x, y) = (-1, 5)
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