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Giselle Riggs
Mathematics
Today, 04:26
What is the first step in solving 2x=y X+y=30
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Colton Richards
Today, 04:50
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Answer: x = 10 y=20
Step-by-step explanation:
You can answer this question by plugging in each equation:
2x=y, x+y=30. Let us plug y as 2x in the second equation x+y=30
x+2x = 30
3x = 30
x=10
After we found x we can then find y by plugging the 10 for x.
2 (10) = y
y = 20
or you could plug in the other equation
10+y=30
subtract 10 from 30 and we get 20
to double check we can plug in both numbers
2 (10) = 20 which is correct
and 10 + 20 = 30 which is correct
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