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12-08-2015
Mathematics

contestada

The numbers x and y have a sum of 1 and a difference of 11.
How do I write a system of equations to represent this information?

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apologiabiology apologiabiology

12-08-2015

sum means add
difference means subttract

x+y=1
x-y=11
add the 2 equations together
2x+0y=12
divide 2
x=6
subitute
6+y=1
subtract 6
y=-5

x=6
y=-5

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