Question 249574: The sum of 2 numbers is 87. If twice the smaller number is subtracted from the larger number, the result is 12. Find the two numbers. How do I solve it step by step?
Answer by chosenpoint(26)   (Show Source):
You can put this solution on YOUR website! Linear-systems/249574 (2009-12-14 04:33:42): The sum of 2 numbers is 87. If twice the smaller number is subtracted from the larger number, the result is 12. Find the two numbers. How do I solve it step by step?
We need to set up a system of equations using x and y, where y is the smaller number.
x+y=87 given
x-2y=12 given
We can then easily subtract the bottom equation from the top equation in order to find the value of y, which leads to
(x-x)+y-(-2y)=87-12 subtract bottom equation from top equation
3y=75 simplify
y=25 divide both sides by 3
x+y=87 given
x+25=87 substitute 25 in for y
x=62 subtract 25 from both sides
Final Answer: 62 and 25
Answer 181745 by chosenpoint(19) on 2009-12-14 04:44:03
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