Question 556012: bill is 4 times as old as john.five year ago the sum of their ages was 50 how old are they now Found 3 solutions by stanbon, Alan3354, TutorDelphia:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! bill is 4 times as old as john.five year ago the sum of their ages was 50 how old are they now
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Equations:
b = 4*j
(b-5)+(j-5) = 50
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Substitute for "b" and solve for "j":
4j-5+j-5 = 50
5j = 60
j = 12 yrs. (john's age now)
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Solve for "b":
b = 4*j
b = 4*12 = 48 yrs (Bill's age now)
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You can put this solution on YOUR website! find the point (x,y) on the line y+-4x-5 that is equidistant from the points (8,-10) and (-7,0)
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y+-4x-5 No equal sign
You can put this solution on YOUR website! bill is 4 times as old as john
b=4j
Five years ago bill was b-5 and john was j-5 (if bill is 48 now, he was 43, 5 years ago)
(b-5)+(j-5)=50
combine like terms
b+j-10=50
add 10 to both sides
b+j=60
sub in 4j for b
4j+j=60
combine like terms
5j=60
divide by 5
j=12
plug in 12 for j
b=48
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