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Skyler Cruz
Mathematics
15 January, 17:15
9x + 8y = - 18
-5x + 3y = 10
+4
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2
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Zion Woodard
15 January, 17:25
0
9x + 8y = - 18 ⇒ 27x + 24y = - 54
-5x + 3y = 10 ⇒ - 40x + 24y = 80
67x = - 134
67 67
x = - 2
27x + 24y = - 54
27 (-2) + 25y = - 54
-54 + 25y = - 54
+ 54 + 54
25y = 0
25 25
y = 0
(x, y) = (-2, 0)
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Harvey
15 January, 17:36
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9x+8y=-18
-5x+3y=10
9x=-18-8y
x=-2-8/9y
-5 (-2-8/9y) + 3y=10
10+40/9y+3y=10
49/9y=0
y=0, x=-2
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