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09-11-2018
Mathematics

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2x + y = 7 y = x + 1 When the expression x+1 is substituted in for y in the first equation, the result is

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09-11-2018

2x+y =7

subtitute

2x+x+1 =7

3x+1=7

subtract 1 from each side

3x=6

divide by 3

x=2

y = x+1

y=2+1

y =3

Answer: x=2, y=3

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