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Mathematics
Cristian Walker
15 October, 20:16
Solve system by elimination
9x-3y=3
3x+8y=-17
+4
Answers (
1
)
Ulises Frye
15 October, 21:49
0
Multiply 2nd equation by - 3 and add to first
9x-3y=3
-9x-24y=51+
0x-27y=54
-27y=54
divide both sides by - 27
y=-2
sub back
3x+8y=-17
3x+8 (-2) = - 17
3x-16=-17
add 16 to both sides
3x=-1
divide 3
x=-1/3
(x, y)
(-1/3,-2)
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