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Jordan Sanders
Mathematics
18 November, 18:35
Solve: 3x-3y=3
y=-5x-17
+1
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1
)
Garrett
18 November, 19:01
0
Substitute y = - 5x - 17 into the first equation:
-3x - 3y = 3
-3x - 3 * (-5x - 17) = 3
-3x + 15x + 51 = 3
-3x + 15x = 3 - 51
12x = - 48
x = - 48/12 = - 4
y = - 5x - 17 = - 5 * (-4) - 17 = 20 - 17 = 3
so the solution is x = - 4, y = 3
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