SOLUTION: Three numbers add up t0 140. The second number is twice the first, and the third number is twice the second. What are the three numbers?
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Question 272875: Three numbers add up t0 140. The second number is twice the first, and the third number is twice the second. What are the three numbers?
Answer by JBarnum(2146) (Show Source): You can put this solution on YOUR website!
are our numbers
the first number is x
the second number is y
the third number is z
"The second number is twice the first"
"third number is twice the second"
_________________________
Solve for by using substitution
multiply
add
divide
___________
solve the other 2 equations
___________
20,40,80 are the 3 numbers in order.
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