The sum of two numbers is 20. The greater number is 4 more than the lesser number. What are the two numbers ?
2 answers:
The two numbers would be 12 and 8 because 12 is 4 more than 8 and so the sum of 12 and 8 is 20.
X=y+4 x+y=20 now substitute the x for (y+4) in the second equation (y+4)+y=20 2y+4=20 2y=16 y=8 now substitute 8 for y in the first equation x=8+4 x=12 so y=8 and x=12
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