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balu736 [363]
3 years ago
6

9x + 7y = 10 7x + 7y = 14

Mathematics
2 answers:
exis [7]3 years ago
7 0
Y=4/7
x=4/9
this is the answer
Veronika [31]3 years ago
3 0
Multiply the second row by -1 to cancel out the 7x.
9x+7y=10
-7x-7y=-14
2x=-4
x=-2

9(-2)+7y=10
-18+7y=10
7y=28
y=4
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4 0
2 years ago
Plz help me 2x+y=4 4x+2y=8
aleksklad [387]

Answer: Y= 2 X=1

Step-by-step explanation:

2x+y=4                  4x+2y=8

2x     =/2                     2y= /2

y=2                          4x=4

                               /4= /4

                               X= 1

6 0
4 years ago
Read 2 more answers
Anita can clean a typical pool in 8 hours. Chao can clean a typical pool in 6 hours. How long should it take Anita and Chao work
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This kind of problems requires to add the working velocities. The total velocity is the sum of the individual velocities.

Anita's velocity = 1 pool/8 hours
Chao's velocity = 1 pool/6 hours

Combined velocity 1/8 + 1/6 = (3 + 4)/24 = 7/24 pool/hour

Time = 1 pool / (7/24) pool/hour = 24/7 hour =3.43 hours
8 0
3 years ago
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