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Neporo4naja [7]
2 years ago
14

What does x = ? If you can't see the numbers I can type them

Mathematics
1 answer:
nikitadnepr [17]2 years ago
7 0
So you know that: 

2x+y=14+y
and
5x-y=x+13y

Here you have two equations with two unknown variables: 
If you isolate x from the second equations you get:
x=(7/2)y
Insert that in the first equations and solve for y: 
2*(7/2)y+y=14+y
y=2

Insert that value for y in one of the two equations (i chose the first): 
2x+2=14+2
x=7

Therefore x=7

Hope that helped. 

Actually you could start with isolating x, and then insert that in one of the two equations.
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