SOLUTION: x+y=6 y=2x

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Question 574164: x+y=6
y=2x
Answer by Maths68(1474) About Me  (Show Source):
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x%2By=6..............(1)
y=2x...............(2)
Put in the value of y from (2) to (1)
x%2B2x=6
3x=6
3x%2F3=6%2F3
cross%283%29x%2Fcross%283%29=cross%286%29%2Fcross%283%29
x=2
Put the value of x in (2)
y=2%282%29
y=4%29
x,y=2,4


Check
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Put the value of x and y in (1)
x%2By=6..............(1)
2%2B4=6
6=6
Put the value of x and y in (2)
y=2x
4=2%282%29
4=4