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Mathematics
19 October, 15:48
Solve using elimination method
X+2y=-1
X-y=8
+3
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Jaydon Moses
19 October, 15:49
0
x+2y=_1
x_y=8
multiplay number infornt of y each sides
_x + 2y=1
2x_ 2y=16
x=17
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Madeline Woods
19 October, 15:57
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Answer: x=5 and y = - 3
Explanation:
x + 2y = - 1
x - y = 8
change the signs of the second equation (-x + y = - 8)
x + 2y = - 1
-x + y = - 8
add this up (as x cancels out u should get) 3y = - 9
y = - 3
substitute this (x + 2 (-3) = - 1)
x + (-6) = - 1
x = + 6 - 1
x=5
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