SOLUTION: One number is 5 more than another number. Three times the first plus twice the second is 30.Find the numbers.

Question 103719: One number is 5 more than another number. Three times the first plus twice the second is 30.Find the numbers.
Answer by elima(1433) (Show Source): You can put this solution on YOUR website!
One number is 5 more than another number. Three times the first plus twice the second is 30.Find the numbers.
x = first number
y = second number
x=y+5
3x +2y = 30
lets substitute x=y+5 in the second equation for x;
3(y+5) + 2y =30
3y + 15 + 2y = 30
5y + 15 =30
5y = 30 -15
5y = 15
y = 3
Now that we have y lets plug that answer into either equation for y;
x = 3 + 5
x = 8
:)
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