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4X + 7Y = 60

-4X + 7Y = - 4

-----------------------+

14Y = 56

Y = 4

---------

insert back into one of these equations to find X

4X + 7(4) = 60

4X + 28 = 60

4X = 32

X = 8

------------check

4(8) + 7(4) = 60

32 + 28 = 60

60 = 60

----------------checks, now second equation

-4(8) + 7(4) = -4

-32 + 28 = -4

-4 = -4

--------------checks

solution set.

X = 8

Y = 4

(8,4)

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โˆ™ 2011-03-04 03:09:18
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A polynomial of degree zero is a constant term

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Q: Solve the system of equations Enter your answer as an ordered pair 4x plus 7y equals 60 negative 4x plus 7y equals negative 4?
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