Asked by ki
the sum of two numbers is 90. their difference is 18. Find the numbers.
Answers
Answered by
JJ
x + y =90
x-y = 18
Add the two equations together which will eliminate y.
Solve for x and then substitute the value for x into the first equation to find y. check the x and y values in both equations to be sure you are correct.
x-y = 18
Add the two equations together which will eliminate y.
Solve for x and then substitute the value for x into the first equation to find y. check the x and y values in both equations to be sure you are correct.
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