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OpenStudy (anonymous):
2. 3x+2y=7
-3+11=y
a.(6,-3
b.(6,-7)
c(-4,9/12)
d.(5,-4)
12 years ago
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OpenStudy (anonymous):
i think the answer is B
12 years ago
OpenStudy (a1234):
Do you have something missing in the second equation?
12 years ago
OpenStudy (anonymous):
yea its -3x im sorry
12 years ago
OpenStudy (ankit042):
K so add the two eauations to proceed you will form a equation in Y
12 years ago
OpenStudy (anonymous):
b is not the answer @Lovecraze1601
12 years ago
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OpenStudy (a1234):
3x+2y=7
-3x+11=y
I'll use substitution:
3x + 2(-3x + 11) = 7
3x - 6x + 22 = 7
-3x = -15
x = 5
3(5) + 2y = 7
15 + 2y = 7
2y = -8
y = -4
(5, -4)
12 years ago
OpenStudy (anonymous):
so thats how u do it
12 years ago
OpenStudy (a1234):
Yup :).
12 years ago
OpenStudy (anonymous):
can u help we with 1 more
12 years ago
OpenStudy (a1234):
Sure.
12 years ago
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OpenStudy (anonymous):
using substitution
2x-y=-7
4x-y=-4
a.(-1.5,4)
b.(1.5,10)
c.(4,-1.5)
d.(-1.5,-2)
12 years ago
OpenStudy (a1234):
Solve for y from any of the two equations:
2x - y = -7
-y = -2x - 7
4x-y=-4
4x - 2x - 7 = -4
2x = 3
x = 1.5
4(1.5) - y = -4
6 - y = -4
-y = -10 or y = 10
(1.5, 10)
12 years ago
OpenStudy (anonymous):
thank you sooooooooooooo much
12 years ago
OpenStudy (a1234):
You're welcome!
12 years ago
OpenStudy (anonymous):
|dw:1394860727086:dw|
12 years ago
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