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ktprada
23.07.2019 •
Mathematics
When i add my second number to twice my first number, the total is 10. when i add twice my second number to my first number, the total is 11?
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Ответ:
Let the first number be x and the second number be y.
Setup the equations:
y + 2x = 10 (1)
2y + x = 11 (2)
Solve x;
From (1):
y + 2x = 10
y = 10 - 2x Sub into (2)
2(10 - 2x) + x = 11
20 - 4x + x = 11
20 - 3x = 11
3x = 20 - 11
3x = 9
x = 3 Sub into (1)
y + 2(3) = 10
y = 10 - 6
y = 4
Find the numbers:
First number = x = 3
Second number = y = 4
The two numbers are 3 and 4.
Ответ: