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Lea
Mathematics
4 February, 08:57
What is the answer to
[x+3y=5
[2x-y=-4
+4
Answers (
2
)
Camron
4 February, 09:00
0
x + 3y = 5 = > x = 5 - 3y
2x - y = - 4
Subs x
2. (5 - 3y) - y = - 4
10 - 6y - y = - 4
10 - 7y = - 4
10 + 4 = 7y
y = 14/7
y = 2
Subs y
2x - y = - 4
2x - 2 = - 4
2x = - 4 + 2
2x = - 2
x = - 2/2
x = - 1
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Kaydence Weiss
4 February, 09:09
0
y=2
x=-1
Step-by-step explanation:
2x-y = - 4 (1)
x+3y=5 (2)
x-4y=-9 (move the 4 to rhs)
x=4y-9
sub the x equation into (2)
4y-9+3y=5
7y=14
y=2
sub y into equation (1)
2x-2=-4
2x=-2
x=-1
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