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Helen [10]
3 years ago
8

1/2x+1/3y=7,1/4x+2/3y=6

Mathematics
2 answers:
Elena-2011 [213]3 years ago
5 0

A is the answer (1/16,14)


mel-nik [20]3 years ago
5 0
We can see that 1/3 times 2=2/3
we can cancel the y terms

multily first equation by -2 and add to 2nd

-x-2/3y=-14
<u>1/4x+2/3y=6 +</u>
-3/4x+0y=-8

-3/4x=-8
times both sides by -4
3x=32
divide both sides by 3
x=32/3

sub back

1/2x+1/3y=7
1/2(32/3)+1/3y=7
16/3+1/3y=7
times 3 both sides
16+y=21
minus 16 both sides
y=5


(32/3,5)
(10 and 2/3,50

C is answer
an easier way would be to get rid of the fractions by multiplying the first equation by 6 and 2nd one by 12 but oh well

C is the answer
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