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Mathematics
Patrick Stout
6 June, 07:30
2) - 7x + 5y=10
4x - 5y=-10
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Kyle Calhoun
6 June, 09:30
0
-7x+5y=10
4x-5y=-10
Find x first by eliminating the y.
Add the two equations together.
-7x+4y=-3y
+5y-+5y = 5y-5y=0
10-+10=0
-3x=0
divide both sides by - 3
-3x/-3=0/-3
x=0
Find y by using x=0 into - 7x+5y=10 (using substitution method)
-7 (0) + 5y=10
0+5y=10
5y=10
divide both sides by 5
5y/5=10/5
y=2
Answer:
(0,2)
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Jamarion Molina
6 June, 10:41
0
To solve this, the problem is solvable by elimination. So you see how the 5y and - 5y cancel out? You basically add those two and you add the - 7x and 4x and 10 and - 10 leaving you with - 3x=0. Dividing by each side gives you x=0. Then, plug 0 in for x in - 7x+5y=10. Giving you
-7 (0) + 5y=10.
0+5y=10
5y=10
Divide by 5 on each side giving you y=2. So your answer is (0,2).
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