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Gre4nikov [31]
3 years ago
9

5a+5b=25 and -5a+5b=35

Mathematics
1 answer:
Alex_Xolod [135]3 years ago
3 0

add the two equations together

5a+5b=25

-5a+5b=35

------------------

 0  + 10b =60

divide by 10

b=6

5a + 5b = 25

5a +5(6) = 25

5a +30 =25

subtract 30 from each side

5a =-5

divide by 5

a = -1

Answer (-1,6)

or a=-1 b=6

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